NIOS Class 10 Science and Technology Chapter 10: FORCE AND MOTION– Chapter-wise Important Questions and Answers
NIOS Class 10 Science and Technology Chapter 10: FORCE AND MOTION | MCQs, Short & Long Answer Questions | 10. FORCE AND MOTION
Chapter 10: FORCE AND MOTION
INTEXT QUESTIONS 10.1
1. Is there any force applied when a cricket player changes the direction of ball by using his/her bat?
Answer: Yes, force is applied when a cricket player changes the direction of the ball using the bat. The force exerted by the bat changes the ball’s direction of motion, showing that force can change the direction of a moving object.
2. Give an example from your daily life in which the shape of an object changes by applying a force.
Answer: An example is pressing a lump of dough with your hands. The force applied changes the shape of the dough.
INTEXT QUESTIONS 10.2
1. What are balanced forces?
Answer: When two or more forces acting on an object in opposite direction balances each other then the forces are known as balanced forces.
2. Can a balanced force produces any acceleration in a body?
Answer: No, a balanced force cannot produce acceleration in a body. Balanced forces do not change the state of motion of an object.
3. What type of change can be produced by an unbalanced force in a body?
Answer: An unbalanced force can change the state of rest or motion of a body. It may make a stationary object move or change the speed or direction of a moving object.
INTEXT QUESTIONS 10.3
1. Why does water comes out from a wet piece of cloth when you shake it?
Answer: Water comes out from a wet piece of cloth due to inertia of rest. When we shake the cloth, the water remains in its position and comes out.
2. Why do we fall forward, when a moving bus stops suddenly?
Answer: We fall forward when a moving bus stops suddenly due to inertia of motion. When the bus stops, our feet stop with the bus, but the upper part of the body continues moving forward, causing us to fall forward.
3. Two similar trucks are moving on a road with the same velocity. One of them is empty while the other one is loaded. Which of the two has more momentum?
Answer: Momentum = mass × velocity. Since both trucks have the same velocity, the loaded truck has more mass. Therefore, the loaded truck has more momentum.
4. If a body of mass 5 kg moves with a velocity of 10 m/s, then what is the momentum of the body?
Answer: Here, m = 5 kg and v = 10 m/s
We have, Momentum = Mass × Velocity =mv 
= 5 kg × 10 m/s
= 50 kg m/s
Therefore, the momentum of the body is 50 kg m/s.
5. Why does a boxer move his head backward while taking an oncoming punch?
Answer: A boxer moves his head backward while taking an oncoming punch to increase the time of impact. This reduces the force of the punch and helps prevent injury.
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