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WorksheetsForce & Motion
Total questions: 48
Worksheet time: 42mins
A mass "m" is projected vertically upward with velocity u, its velocity becomes v after one second, Distance covered is __________
u + v
u + g
u + g/2
u - g/2
For one complete rotation, the ratio between distance and displacement is equal to ______
1
<1
0
infinity
Which of the following is correct representation of speed vs time for a body projected vertically upward ?
a
b
c
d
A bomber jet while chasing another jet is flying at 500 km/s. It opens fire, then its velocity _____
remains constant
increases
decreases
none of these
Water while flowing through a pipe with 100 m/s exerts a force of 1 kN. The volume rate flow is equal to _____
1000 m3/s
100 m3/s
0.001 m3/s
0.01 m3/s
The acceleration of a rocket ______ as it gains height
increases
decreases
remains same
becomes equal to "g"
A projectile covers horizontal distance of 100m when projected at an angle of 35°. It will have the range of 100 m even it is projected with _____
15°
25°
55°
75°
Ratio of maximum height obtained by projectile and time taken to reach maximum height is equal _____
1/4 tanθ
1/4 cotθ
1/2 vi cosθ
1/2 vi sinθ
A missile of mass 500 kg is fired from the ground with 40 m/s velocities at an angle of 60° with horizontal. K.E of missile at maximum height is ____
50 KJ
75 KJ
100 KJ
125 KJ
A rocket is fired horizontally from the top of a cliff at 100 m/s, it hits the ground in 10 seconds, height of the cliff is _____
980 m
490 m
49 m
98 m
When the angle of projection increases beyond 45°
range & height both decreases
range increases but height decreases.
range & height both increases
range decreases but height increases
A man throws a ball vertically upward while sitting in a uniformly moving roofless car. The path of the ball observed by the man_____
rectilinear
curved
parabolic
hyperbolic
In the last question, the path observed by the person standing on the road is_____ when the roofless car passes near him.
rectilinear
curved
parabolic
hyperbolic
The impulse of the body is ____ when it moves from A to B with a speed of 100 m/s, provided that A and B are 10 m apart.
0 Ns
10 Ns
100 Ns
1000 Ns
The velocity-time graph of the two bodies is straight-line inclined at 60° and 30° respectively. Find the ratio of their acceleration
3
1/3
√3
1/√3
A body travels 200 cm in the first 2 seconds and 220 cm in the next 4 seconds. What will be the velocity at the end of the 7th second from the start?
5 cm/s
10 cm/s
15 cm/s
20 cm/s
A train moves from one station to another in 2 hours' time. Its speed during the motion is shown in the graph. Maximum acceleration during the journey is
40 km/h2
80 km/h2
160 km/h2
320 km/h2
Speed of train is reduced from 72km/h to 36km/h while it travels a distance of 200m. For uniform retardation, how much further it travels before it stops
approx 33 m
approx 67 m
approx 33 km
approx 67 km
Boy on 20m high cliff drops a stone. 1 sec later he throws down another stone. Both hit ground simultaneously. Find the initial velocity of 2nd stone.
15 m/s
20 m/s
25 m/s
30 m/s
Body of mass m moving with a const. velocity v hits another body of same mass at rest & sticks to it. The velocity of the compound after the collision is
zero
v
v/2
2v
The graph shows how the speed of an object changes with time. Which section shows that the object is moving with an increasing acceleration?
A
B
C
D
The ratio of displacement along diameter and total distance along circle is
π : 1
2 : π
π : 2
1 : π
A ball of K.E is 68J projected at an angle 60° to horizontal K.E of the ball at the highest point of its flight will be
17 J
16 J
10 J
20 J
The diagram shows the displacement-time graph for a particle moving in a straight line. The average velocity from 0 to 1s and then from 1s to 3s is
1 : 2
1 : 3
2 : 1
3 : 1
The slope of a velocity-time graph gradually decreases then the body is said to be moving with
Positive acceleration
Negative acceleration
constant acceleration
both a & b are possible
The graph shows the speed of two cars over a period of time. Find the information in the graph, which statement Is correct?
Car X accelerates at the same rates as car Y
Car X and car Y always travel at constant speed
Car X is more powerful than car Y
Car X starts at a faster speed than car Y
Find the weight of meter rod, balanced at 10 cm. Mass of 10 kg Is suspended at extreme left, where as 10 N weight Is hung at 90 cm mark?
5 N
15 N
25 N
50 N
Arshad is driving down 7th street. He drives 150 meters in 18 seconds. Assuming he does not speed up or slow down. What is his speed?
0.38 m/s
126 m/s
58.3 m/s
8.3 m/s
When we kick a stone or a football, which of the following options is correct?
More ΔP in first case
Less reaction time in first case
Less impacting force in second case
Both "B" and "C"
Find the total distance covered by a car when it decreases its velocity at a constant rate.
1 km
10 km
100 km
1000 km
If a missile is launched from a submarine at 30° with horizontal. After what time will it strike the ground?
In 0.5 s, if thrown with 200 m/s
In 30 s, if thrown with 400 m/s
In 20 s, if thrown with 200 m/s
all of these
At which point for projectile its kinetic energy is completely converted into potential energy
at point of projection
at the highest point
point to hit the ground
not possible
The variation of force acting on a body with time is shown. What is the change in momentum of body after 4s?
10 Ns
20 Ns
40 Ns
80 Ns
When a lighter body of mass m1 collides with a heavier body of mass m2, velocities of both bodies after collision will be ______ respectively
0, -v1
-v1, 0
v1, 2v1
v2, v1
Stone is dropped from a 30m high cliff. At the same time, another stone is thrown upwards from ground with 30m/s. After how much time they will cross?
4 s
3 s
2 s
1 s
A ball is projected with a speed of 10 m/s. What are the two angles of projection for which the range is 5m?
15°, 75°
25°, 65°
30°, 60°
all of these
When the velocity of a body changes from Vi to Vf during the time"t". The ratio of sum and difference of velocities is equal to
2S/at^2
1/2 at^2
2S/t
2S/at
The velocity-time graph for a vehicle is shown in the figure, the distance covered is --------- km.
1
1.8
1.5
2
The inertia of a body has a direct dependence on
velocity
volume
mass
acceleration
An object is dropped from rest. Its v-t graph is
A
B
C
D
The displacement time graph of a ball thrown vertically upward is shown in the figure then its v-t graph is
A
B
C
D
Velocity and acceleration are in the same direction when
The velocity of a car is increasing on u straight road
The velocity of a car is decreasing on a straight road
Car is turning around a comer
None of these
How far does car travel in 6s if its initial velocity is 2 m/s and its acceleration is 2 m/s^2 in the forward?
12 m
24 m
36 m
48 m
A ball is in free fall. Its acceleration is:
zero
g, down
g, up
g, arbitrary direction
Consider the following five graphs (note the axes carefully). Which of these represents motion at constant speed?
IV only
I and IV only
IV and V only
I and II only
A racing car traveling with constant acceleration increases its speed from 10 mins to 50 mins over a distance of 60 m. How long does this take?
2 s
4 s
5 s
8 s
The displacement time graph for a moving particle is given below. The instantaneous velocity of the particle is negative at the point.
C
D
E
F
Nobody begin to move or comes to rest itself is a statement of
Newton
Abu Ali Sina
Maxwell
Galileo
