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WorksheetsNewtons Law of Motion
Total questions: 15
Worksheet time: 4mins
The rate of change of (a) is directly proportional to the force applied on it.
The 3 laws of Motion were formulated by
Einstein
Isaac Newton
Heisenberg
An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a friction less horizontal table. The force required to keep the object moving with the same velocity is:
32 N
0 N
8 N
2 N
Newton’s third law of motion explains the two forces namely ‘action’ and ‘reaction’ coming into action when the two bodies are in contact with each other. These two forces:
Always act on the same body
Always act on the different bodies in opposite directions
Have same magnitude and direction
Acts on either body at normal to each other
In a rocket, a large volume of gases produced by the combustion of fuel is allowed to escape through its tail nozzle in the downward direction with the tremendous speed and makes the rocket to move upward.
Which principle is followed in this take off of the rocket?
Moment of inertia
Conservation of momentum
Newton’s third law of motion
Newton’s law of gravitation
A water tank filled upto 2/3 of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would(a)
Move backward
Move forward
Come to the rest
Be unaffected
Velocity versus time graph of a ball of mass 50 g rolling on a concrete floor is shown in the figure above.
What will be the frictional force of the floor on the ball?
(Hint: use formula of momentum)
1 N
0.1 N
100 N
1000 N
The seat belts are provided in the cars so that if the car stops suddenly due to an emergency braking, the persons sitting on the front seats are not thrown forward violently and saved from getting injured.
Which law can be used to explain this?
Answer:(a) Newton’s first law of motion
Newton’s first law of motion
Newton’s second law of motion
Newton’s third law of motion
Newton’s law of gravitation
When a balloon held between the hands is pressed, its shape changes. This happens because:
Balanced forces act on the balloon
Unbalanced forces act on the balloon
Frictional forces act on the balloon
Gravitational force acts on the balloon
The speed of a car weighing 1500 kg increases from 36 km/h to 72 km/h uniformly. What will be the change in momentum of the car?
(Consider the units carefully)
15000 kg km/h
15000 kg m/s
54000 kg m/s
54000 g m/s
Newton’s first law of motion says that a moving body should continue to move forever , unless some external forces act on it. But a moving cycle comes to rest after some time if we stop pedaling it.
Can you choose the correct reason for the stoppage of cycle?
i. Air resistance
ii. Gravitational pull of the earth
iii. Friction of the road
iv. Heat of the environment
Choose the correct option:
(iii) and (iv)
(i) and (iii)
(i) and (ii)
(ii) and (iii)
The inertia of a moving object depends on:
i. Mass of the object
ii. Momentum of the object
iii. Speed of the object
iv. Shape of the object
Choose the correct option:
(i) and (ii)
only (ii)
only (i)
(iii) and (iv)
What options are true about momentum?
(more than one options can be correct)
Momentum is a vector quantity
The Unit of Momentum is kgm/s
Momentum is a scalar quantity
When two bodies acts on each other and no external force is acting on the system, then the momentum remains constant
The image shows one empty trolley and one filled with grocery. Less force is required to push or pull the lighter trolley because of its less mass and it will have less acceleration as compared to the filled trolley.
True
False
Two kids are playing on the skateboard. Skateboard moves ahead when the kids apply force on the road. According to Newtons Third Law of motion this is possible because of action-reaction of 2 forces.
Choose the correct option
Friction = Action, Force on the road = Reaction
Friction = Reaction, Force on the road = Action
Drag = Action, Force on the road = Reaction
Friction = Action, Drag = Reaction
