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WorksheetsForce and Laws of Motion
Total questions: 40
Worksheet time: 30mins
A block of weight 5 units is placed on a horizontal table. A person pushes the block from top by exerting a downward force of 3 units on it. What is the total force exerted by the table on the block.
5N
2N
8N
3N
The unit of force is
m/s
m/s2
kgm/s2
Nm2kg-2
What are the forces acting on a car moving down the road
Air drag
Gravitational force
Friction force
Electrostatic force
A body is moving in a straight line with constant speed. The unbalanced force acts
in the direction of motion of body
in opposite direction of motion
in perpendicular direction
none of these
A and B are two objects with masses 6 kg and 34 kg respectively. Which has more inertia?
A
B
Equal inertia
None of these
Action and reaction according to Newton's third law
Acts on same body in same direction
Acts on different bodies in same direction
Acts on different bodies in different directions
Acts on same body in different directions
Which of the following is not an example of
Newton’s third law of motion?
Walking
Swimming
Seatbelt
Recoil of gun
Which Newton’s law of motion defines force?
First
Second
Third
Fourth
Which laws comes into picture here
Moment of Inertia
Conservation of Momentum
Newton's Third law
Universal law of gravitation
The three types of inertia are
motion, rest and direction
motion, rest and mass
motion, rest and shape
motion, rest and behaviour
The amount of matter in an object is called
Force
Strength
Mass
Density
A force that makes an object move in a circle is called
Gravitational force
Centrifugal force
Centripetal force
Rotatory force
You can increase the momentum of an object by
decreasing its velocity
increasing its mass
decreasing its mass
increasing its velocity
What is force of a skydiver who has a mass of 100kg and accelerates at a speed of 9.8m/s2?
98N
980N
9800N
9.8N
9. Principle of conservation of linear momentum
can be deduced from Newton’s
1st Law
2nd Law
3rd Law
4th Law
In a tug-of-war between the term A and B, the rope breaks at a point which is nearer to A.
Then
A has applied more force
B has applied more force
A and B have applied equal force
None of these
Mass of a body is doubled. How does its acceleration change under the acceleration of same force?
Remains same
Doubles
Halves
Triples
Changes that a force can bring on a non-rigid body fixed at a point are
Speed and direction
Speed and shape
Shape and size
size and direction
If a paper ball and paper sheet of same mass is dropped from the same height, then which one will reach the ground first if air resistance is neglected?
Paper ball
Paper sheet
Both at the same time
None of these
What is the constant that equates the proportional relation between force and acceleration
Strength
Momentum
Mass
Acceleration
A passenger in a moving train tosses a coin which falls behind him. It means that motion of the train is
accelerated
uniform
retarded
along circular tracks
Dry leaves fall when a tree is shook because of
Momentum
Force
Inertia
Acceleration
A number of forces acting on a body changes velocity of the body. The forces cannot be
Paralleled
Balanced
Inclined
Unbalanced
Newton’s third law is equivalent to the
law of conservation of energy
law of conservation of angular momentum
law of conservation of linear momentum
law of conservation of energy and mass
A body, whose momentum is constant, must have constant
force
velocity
acceleration
all of these
Choose the correct option
Action and reaction forces act on same object
Action and reaction forces act on different objects
Both a and b are possible
Neither a nor b is correct.
Two bodies of equal masses (m) moving with equal speed (v) in opposite directions collide and stick to each other. The resultant velocity of the combination is
v
2v
v/2
zero
A hockey player pushes the ball on the ground. It comes to rest after travelling certain distance because
the player stops pushing the ball
balanced force acts on the ball
the opposing force acts on the ball.
none of these
How much force acts on a body whose momentum p is constant with time t ?
One
2p/t
t/2p
zero
Another name for momentum is
(a)
In any interaction between two or more isolated objects, the total (a) does not change.
Particle is at rest if force is zero
True
False
Particle moves in the direction of force.
True
False
CGS unit of force is
(a)
When a horse pulls the cart, even the cart pulls the horse with same amount of force
True
False
Force acting on a body can be reduced by increasing the smoothness of the surface of the body
True
False
A cricket player moves his hand backward while catching the ball? Which principle is involved here?
1st Law
Inertia
Conservation of momentum
3rd Law
Two identical bullets are fired one by a light rifle and the other by a heavy rifle with the same force. Which rifle will hurt the shoulder more?
Heavy rifle
Light rifle
Both
Both will not hurt
Can momentum of a body be negative?
Yes
No
Which one of these is a fundamental force of nature
Frictional force
Muscular force
Strong Nuclear force
Molecular force
Life force
