Application of Force

Q.

Give two examples of situations where you push or pull to change the state of motion of objects.

Q.

Give one example where force changes the shape of an object.

Q. Convert $10N$ into C.G.S unit (dyne).

1. ${10}^{9}dyne$
2. ${10}^{6}dyne$
3. ${10}^{8}dyne$
4. ${10}^{7}dyne$

Q.

(a) Give one example where force changes the speed of a moving object.

(b) Give one example where force changes the direction of a moving object.

Q.

What is force? State the various effects of force.

Q.

Why Carnot cycle is not practically possible ?

Q.

What can you conclude about the characteristics of friction?

Q.

Define the terms rotational motion and rotational dynamics.

Q. What is motion? Differentiate between slow and fast objects.

Q.

Explain with proper examples motion is relative.

Q.

What is absolute motion?

Q.

Define the term gram force.

Q.

(a) Give one example where force is moving object.

(b) State one example where force stops a moving object.

Q.

Is force required to keep a object moving?

Q.

Is absolute motion possible?

Q.

Question 4 (a)
An archer stretches her bow while taking aim at the target. She then releases the arrow, which begins to move towards the target. Based on this information fill up the gaps in the following statements using the following terms:

muscular, contact, non-contact, gravity, friction, shape, attraction

(a) To stretch the bow, the archer applies a force that causes a change in its ___.

Q.

Which of the following is not an effect of force ?
(a) a force can change the speed of a moving object
(b) a force can change the direction of a moving object
(c) a force can change the composition of a moving object
(d) a force can change the shape and size of an object

Q.

The shape and size of a solid can be changed on the application of an _____.

Q.

While travelling in a train, it appears that the trees near the track are moving whereas co-passengers appear to be stationary. Explain the reason.

Q.

Friction reduces the efficiency of the machine

1. True
2. False

Q. What effect of force is observed when brakes of a vehicle are applied?

1. Change in shape of the body
2. Change in size of the body
3. Change in direction of motion of the body
4. Change in speed of the body

Q.

What are the 5 differences between algorithms and flowchart?

Q. What are the various effects of force? State one example of each.

Q.

What is force? State the various effects of force.

Q.

The force acting on a body can change its shape.

1. True

2. False

Q. What do you understand by states of motion of an object?

Q.

Imagine that an object is falling through a long straight glass tube held vertical; the air has been removed completely from the tube. The object does not touch the walls of the tube. Will the object experience any force of friction?

Q. Give examples of forces which change the shape of the objects.

Q.

Is force applied in isolation?

Q.

1. A blacksmith hammers a hot peace of iron while making a tool. How does the force due to hammering affect the peace of iron?