Worksheetsvuvuvfu
Total questions: 90
Worksheet time: 2hrs 17mins
A vehicle travels 2345 m in 315 s toward the evening sun. What is its speed?
7.44 m/s
0.13 m/s
738,675 m/s
7.44m
What distance will a car traveling 65 km/hr travel in 180 min?
11,700 m
195 m
21.7 m
2.77 m
A car travels 240 km in 2 hours and a sprinter travels 100 m in 9.5 sec. Who is traveling faster?
the car
the sprinter
they are traveling the same speed
not enough information to answer this question
A train travels 120 km in 2 hours and 30 minutes. What is its average speed?
60 km/hr
240 km/hr
48 km/hr
300 km/hr
Which of the following has INCORRECT units?
speed = m/s
time = s
displacement = m
velocity = s
What is motion?
the stopping of an object to a frame of reference
a change in position relative to a frame of reference
the middle ground between light and shadow, between science and superstition, and it lies between the pit of man's fears and the summit of his knowledge
a change in the time in which it takes to get an office referral
A change in ________ in a certain amount of time is motion.
speed
appearance
position
weight
An old lady rolls down a hill at 3 meters/second. The hill is 36 meters long. How many seconds does it take the old lady to reach the bottom of the hill?
39 seconds
12 seconds
15 seconds
33 seconds
Slope of distance time graph represents-
speed
acceleration
displacement
none of these
SI unit of acceleration is-
ms-1
ms-2
ms2
none of these
Which of the following is a scalar quantity?
acceleration
velocity
distance
displacement
Rate of change of velocity is called-
average speed
average velocity
acceleration
none of these
When an object travels equal distance in equal intervals of time, it is said to be in-
uniform acceleration
non uniform accelration
uniform motion
non uniform motion
Displacement is represented by-
slope of s-t graph
slope of v-t graph
area under s-t graph
area under v-t graph
Speed of an object is equal to the magnitude of velocity if-
the object is travelling in uniform circular motion
the object is travelling along a straight path
the initial and final positions are same
none of these
An object moving in a circular path with uniform speed experiences a continuous change in its
direction
velocity
speed
both a and b
The numerical ratio of distance to displacement is always
more than 1
equal to one
less than or equal to 1
more than or equal to 1
The nature of s-t graph for rest -
straight line passing through origin
straight line parallel to time axis
straight line perpendicular to time axis
straight line overlapping time axis
Position time graph for zero acceleration -
straight line parallel to time axis
straight line passing through origin
curved line
zig zag line
Straight line overlapping time axis on v-t graph shows -
uniform velocity
uniform acceleration
rest
none of these
WHAT I LEARNT?
MOTION ALONG A STRAIGHT LINE
RATE OF CHANGE OF VELOCITY
GRAPHICAL REPRESENTATION OF MOTION
UNIFORM CIRCULAR MOTION
WHAT I FOUND INTERESTING?
MOTION ALONG STRAIGHT LINE
RATE OF CHANGE OF VELOCITY
GRAPHICAL REPRESENTATION OF MOTION
UNIFORM CIRCULAR MOTION
WHAT I FOUND DIFFICULT?
MOTION ALONG A STRAIGHT LINE
RATE OF CHANGE OF VELOCITY
GRAPHICAL REPRESENTATION OF MOTION
UNIFORM CIRCULAR MOTION
A fielder pulls his hands backwards after catching the cricket ball. This enables the fielder to:
exert larger force on the ball
reduce the force exerted by the ball
increase the rate of change of momentum
keep the ball in hands firmly
The inertia of an object tends to cause an object
to increase its speed
to decrease its speed
to resist a change in its state of motion
to decelerate due to friction
The rockets work on the principle of conservation of (a) .
Newton's first law of motion is also called Galileo's law of (a) .
When we talk of a force acting on a body, it usually means:
electrical force
balanced force
unbalanced force
nuclear force
Forces in a Newton's third law pair have equal magnitudes but act in opposite (a) .
Is motion relative ?
Yes
No
I know but i don't remember now
Don't Know
Distance traveled by a car in first 5 mins is the same as the distance it covers in next 5 mins which is same as the distance covered by it in next 5 mins. the car is executing
Non- uniform motion
Uniform Motion
Uniform Circular Motion
None of these
Acceleration is measured opposite to velocity then
acceleration is taken as positive
acceleration is taken as negative
Both options
None of these
The motion of an athlete moving in a circular path at constant speed is an example of
uniform motion
accelerated motion
uniform circular motion
straight line motion
Balanced forces do not change the state of motion of an object.
True
False
None of these
Don't Know
Frictional Force acts in the
same direction as motion
opposite direction of motion
friction force is not real
all of the above
More massive objects have less inertia
True
False
None of these
Mass and inertia are not related
In cricket the fielder while making a catch gradually pulls his hands backwards with moving ball. This is an application of
Newton's First Law of Motion
Newton's Second Law of Motion
Newton's Third Law of Motion
None of these
When a sailor jumps in the forward direction from a small boat the boat moves backwards. Here reaction force is
In the same direction of applied force.
Opposite to the direction of applied force
Enough data not provided
None of these
Law of conservation of momentum states that the sum of momenta before collision is equal to the sum of momenta after collision provided________
there is no external unbalanced force acting on them
there is external unbalanced force acting on them
there maybe one external unbalanced force acting on them
there might be an external unbalanced force acting on them
Name the force that causes acceleration of an object moving along a circle and keeps the body moving.
centripetal force
centrifugal force
repulsive force
attractive force
For a given force acceleration is inversely proportional to the mass of an object.
A. The above statement is correct because F=ma
B.The statement is not correct because the value of g is constant.
option A is wrong
both option A and B are wrong because the reasons given are wrong
only option A is correct
both A and B are correct.
Which of the following Laws of Kepler did Newton use to calculate the force of attraction?
Sun is situated at the centre of the orbit
The orbit of the planet is ellipse
The cube pf the mean distance of a planet from the sun is proportional to the square of its orbital period.
The line joining the planet and the sun sweeps equal areas in equal interval of time.
The SI unit of G
Ncm²/kg²
Nm²kg²
Nm²/kg²
Nkg/m²
The SI unit of weight
kg
N/m²
N
N cm/s²
What is the gravitational force between two objects?
attraction at large distance only
attraction at small distance only
attraction at all distances
attraction at large distances but repulsive at small distances
A ball is thrown up, the value of g will be?
zero
negative
positive
negligible
The gravitational forces cause
Tides
Motion of moon
none of these
both a and b
The earth attracts the moon with a gravitational force of 10²² N.The moon attracts the earth with a gravitational force of
less than 10²² N
10²² N
Greater than 10²² N
10-²² N
The upward force exerted by water on an object in it is called
pressure
thrust
buoyancy
drag
The relative density of an object is determined comparing its density with that of
water
air
iron
wood
A stone is released from the top of the tower with height 81.64 m.Calculate its final velocity before touching the ground.
90m/s
60m/s
40m/s
50m/s
A ball thrown up vertically return to the earth after 12s . Find the velocity with which it was thrown up?
29.4m/s
58.8 m/s
36.5m/s
48.8m/s
The volumes of 180g and 18g of a substance is 200cm³ and 20cm³ respectively.If the density of water is 1g/cm³ then
both will sink
both will float
first substance will float and the second will sink
the second will float and the first will sink
According to Archimedes principle the upward force experiencing on a body immersed in it will be equal to
the amount of water displaced
the volume of water displaced
the weight of the water displaced
the area of the object in contact with the water
The mass of moon is about 0.012 times that of the earth and its diameter is about 0.25 times that of earth. The value of G on the moon will be:
Same as that on the earth
About one-fifth of that on the earth
About one-sixth of that on the earth
About one-fourth of that on the earth
An apple falls from a tree because of the gravitational attraction between the earth and the apple. If F1 is the magnitude of the force exerted by the earth on the apple and F2 is the magnitude of the force exerted by the apple on the earth, then
F1 is very much greater than F2
F2 is very much greater than F1
F1 and F2 are equal
F1 is only a little greater than F2
A stone is released from the top of a tower of height 19.6 m. Then its final velocity just before touching the ground will be:
384.16 m/ s
196 m/s
19.6 m/s
3841.4 m/s
. A boy is whirling a stone tied with a string in a horizontal circular path as shown in the following figure:
Will move along a straight line towards the centre of the circular path
Will move along a straight line the tangential to the circular path
Will move along a straight line perpendicular to the circular path away from the boy
Will continue to move in the circular path
The gravitational force between two bodies is decreased by 36% when the distance between them is increased by 3m. The initial distance between them is
6m
9m
12m
15m
If the distance between two bodies is increased by 25%, then the % change in the gravitational force is
Decreases by 36%
Increases by 36%
Increases by 64%
Decreases by 64%
Acceleration due to gravity on the surface of a planet is g/5 where g is the value on the earth. When a body is vertically thrown up on the earth, it reaches a maximum height h. If the same body is projected with the same velocity from the surface of planet, maximum height reached by it would be
h/5
h/25
5h
25h
An object falls through a distance h in certain time on the earth. The same object falls through a distance 4h in the same time on a planet. If 'g' is acceleration due to gravity on the earth, acceleration due to gravity on that planet is
g/4
4 g
g/2
2 g
The gravitational force between two objects is F. If masses of both objects are doubled and distance between them becomes doubled, then the gravitational force would become
4F
6F
2F
F
The weight of any person on the moon is about 1/6 times that on the earth. He can lift a mass of 12 kg on the earth. What will be the maximum mass, which can be lifted by the same force applied by the person on the moon?
60KG
72KG
96KG
54KG
choose corect relation the average density of the earth in terms of g, G and R.
4g/3πGR
3g/4πGR
3G/4πgR
4G/3πgR
How does the mass weight of an object vary with respect to mass and radius of the earth. In a hypothetical case, if the diameter of the earth becomes half of its present value and its mass becomes four times of its present value, then how would the weight of any object on the surface of the earth be affected?
m,w
16m,w
m,16w
16m,16w
A satellite of the earth is revolving in a circular orbit with a uniform speed v. If the gravitational force suddenly disappears, the satellite will
Continue to move with velocity v along the original orbit
Move with a velocity v, tangentially to the original orbit
Fall down with increasing velocity
Ultimately come to rest somewhere on the original orbit
A man can jump to a height of 1.5 m on a planet A. What is the height he may be able to jump on another planet whose mass and radius are, double to the planet A
1.5 m
3.0 m
4.5 m
6.0 m
The masses of two planets are in the ratio 1 : 2. Their radii are in the ratio 1 : 2. The acceleration due to gravity on the planets are in the ratio
1 : 2
2:1
1:4
4:1
Identical packets are dropped from two aeroplanes, one above the equator and the other above the north pole, both at height h. Assuming all conditions are identical, will those packets take same time to reach the surface of earth.
at poles reaches early
at equator reaches early
reaches at equal rate at poles and equator
never reach earth
On the earth, a stone is thrown from a height in a direction parallel to the earth’s surface while another stone is simultaneously dropped from the same height. Which stone would reach the ground first and why?
free fall will reach first
body with horizontal motion reach first
both will reach at same time
never reach ground
Two particles are placed at some distance. If the mass of each of the two particles is tripped, keeping the distance between them unchanged, the value of gravitational force between them will be
1/9 times
9 times
6 times
1/6 times
Two objects of different masses falling freely near the surface of moon would
have same velocities at any instant
have different accelerations
experience forces of same magnitude
undergo a change in their inertia
The value of ‘g’
Increases as we go above the earth’s surface
Decreases as we go to the centre of the earth
Remains constant
Is more at equator and less at poles
