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WorksheetsForce & Motion
Total questions: 50
Worksheet time: 1hrs 5mins
Inertia of a body has direct dependence on
Velocity
Density
Volume
Mass
A man is at rest in the middle of a pond on perfectly smooth ice. He can get
himself to the shore by making use of Newton’s
First law
Second law
Third law
All the laws
Two balls projected at 30^o and 60^o with same initial velocities. The ratio of their maximum heights is
1:2
1:3
1:4
1:5
A graph is drawn with force along Y-axis and time along X-axis. The area under the
graph represents
Momentum
Couple
Moment of the force
Impulse of the force
At which point for a 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
A 7.0 kg bowling ball experiences a net force of 5.0 N what will be its acceleration?
7.1 ms^-2
0.71 ms^-2
5.0 ms^-2
35.0 ms^-2
Two projectiles are fired at different angles with the same magnitude of velocity such that they have the same range. At what angles they might have been projected?
35° and 75°
25° and 65°
10° and 50°
NONE
A train takes 1 hour to go from one station to the other. It travels at a speed of 30 kmh–1
for first half hour and at a speed of 50 kmh–1
for the next half hour. The average speed of the train is:
45 kmh-1
35 kmh-1
40 kmh-1
30 kmh1-
A
B
C
D
If a projectile is thrown with 19.6m/s velocity at 30° with x-axis, time taken to reach highest point?
1 sec
2s
3 s
4 s
The distance travelled is given by
Area under speed-time graph
Area under distance-time graph
Slope of velocity-time graph
Slope of distance-time graph
If a body starts from a point, and returns back to the same point, then its
Average velocity is zero but not average speed
Both average velocity and average speed are not zero
Average speed is zero but not average velocity
Both average speed and average velocity are zero
Velocity and acceleration are in the same direction when
Velocity of a car is increasing on a straight road
Velocity of a car is decreasing on a straight road
Car is turning round a corner
None of these
When the average velocity of a moving body is equal to its instantaneous velocity
then it is moving with
Uniform velocity
Uniform acceleration
Variable velocity
Variable acceleration
If the initial speed of a projectile is doubled.
Its range will double
Its range will quadruple
Its range will be decreased by a factor of two
Its range will decrease by a factor of four
In straight line motion the
Acceleration is parallel (or antiparallel) to the velocity
Acceleration is perpendicular to the velocity
Acceleration is vertical, while the velocity can be in any direction
Acceleration is vertical and the velocity is horizontal
In projectile motion the
Acceleration is parallel (or antiparallel) to the velocity
Acceleration is perpendicular to the velocity
Acceleration is vertical, while the velocity can be in any direction
Acceleration is vertical and the velocity is horizontal
A ball is in free fall. Its acceleration is:
Downward during both ascent and descent
Downward during ascent and upward during descent
Upward during both ascent and descent
Upward during ascent and downward during descent
A baseball is thrown vertically into the air. The acceleration of the ball at its highest point is:
Zero
g, up
g, down
2g, down
A newton is the force
Of gravity on a 1kg body
Of gravity on a 1g body
That gives a 1kg body an acceleration of 1m/s2
That gives a 1g body an acceleration of 1cm/s2
A projectile is thrown at an angle of 30
o with the horizontal has a range R1, and attains a
maximum height h1 –Another projectile thrown, with the same velocity at an angle 30 o with the
vertical has a range R2 and attains a maximum height h2. The relation between R1 and R2 is
R = R2/2
R1 =R2
R1 =2R2
R1 =4 R2
Consider the following five graphs
A
B
C
D
The displacement time graph for a moving particle is given below. The
instantaneous velocity of the particle is negative at the point.
D
F
C
E
The ratio of magnitudes of average velocity to average speed of a moving body in a straight line
Always less than one
Always equal to one
Always more than one
Equal to or more than one
Both A and B
The “reaction” force does not cancel the “action” force because:
The action force is greater than the reaction force
They act on different bodies
Both
None
Deceleration may be
Zero
Positive
Negative
Positive or negative
No body begin to move or comes to rest itself is statement of
Newton
Maxwell
Abu Ali Sena
Planck’s
The slope of distance – time graph will always be:
Negative
Positive
Zero
Maximum
Decrease in velocity per unit time is called
Acceleration
Deceleration
Positive acceleration
Uniform acceleration
Displacement-time graph for an object moving with constant velocity is a
Straight line parallel to time axis
Straight line passing through origin
Elliptical
Straight line parallel to displacement axis
An object is accelerating
Only when its speed changes
Only when its direction changes.
When its speed or direction changes.
If its velocity is large
If the force acting on a body is doubled, then the acceleration produced is _
1/2
1/4
Doubled
Quadrupled
Given here is a velocity-time graph of the motion of a body. What is the distance
travelled by the body during the motion?
A
B
C
D
What will happen if a force is applied to a body moving with a constant speed along
a straight line?
The speed increases
The direction changes
The momentum decreases
Continues to move with uniform velocity
A ball is thrown and follows a parabolic path, as shown above. Air friction is negligible. Point Q is the highest point on the path. Which of the following best indicates the direction of the acceleration, if any, of the ball at point Q?
A
B
C
D
Which graph represents the zero acceleration?
A
B
C
D
If a stone is released from moving train, then the stone will follow
Hyperbolic path
Straight path
Parabolic path
Circular path
A body, whose momentum is constant, must have constant
Force
Velocity
Acceleration
All of these
Instantaneous and average velocities become equal when body.
Has zero acceleration
Has uniform acceleration
Has variable acceleration
Moves in a circle
From the following displacement-time graph find out the velocity of a moving body
A
B
C
D
A body of mass m collides against a wall with a velocity v and rebounds with the
same speed. Its change of momentum is
2mv
mv
-mv
Zero
A person can throw a stone to maximum distance of 80m the greatest height to
which he can throw the stone is
100m
50m
80m
20m
At the top of trajectory in projectile motion angle between v and acceleration is
90°
60°
0°
180°
K.E of projectile at highest point is half of its initial K.E angle of projection is
30°
45°
60°
None
The speed of a car weighing 1500 kg increases from 36 km/h to 72 km/h uniformly. What
15000 kg km/h
15000 kg m/s
54000 kg m/s
54000 g m/s
If R = Rmax/ 2
then angle of projection is
15°
30°
45°
60°
If two equal masse (m1 = m2) collide elastically in one dimension, where m2 is at rest and m1 moving with velocity u1, then final velocities of the two masses are
v1 = v2 = 0
v1 = 0; v2 = u1
v1 = –u1; v2 = 0
v1 = 0 ; v2 = –u1
A rifle of mass M is initially at rest but free to recoil. It fires a bullet of mass m and
velocity v (relative to the ground). After firing, the velocity of the rifle (relative to
the ground) is:
−Mv/m
−mv
mv/M
−mv/M
The acceleration of a projectile relative to another projectile is
g
0
-g
2g
According to newton second law
F=ma
F=m/a
F=a/m
a=m/F
