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Assignment on Force and Pressure

Soumi R.
21/06/2017 0 0

ASSIGNMENT NO:1

FORCE AND PRESSURE

Q1) Fill in the blanks

a. A force arises due to __________ between two objects.

b. An example of a non-contact force is __________.

c. The pressure exerted by air around us is known as __________.

d. Strength of the force is expressed by its __________.

e. Application of force can change the __________, __________ and __________ of an object.

f. Force exerted by our muscles is called __________ force.

g. Direction of force of friction is always __________ to the direction of motion.

h. Force per unit area is called ___________.

Q2) Complete the following sentences:

a. If two equal forces act in the opposite directions on an object, the net force acting on it is __________.

b. It is easier to cut with a sharp knife than with a blunt one because ________________________ ____________________.

c. Porters place a round piece of cloth on their heads, when they have to carry heavy loads because __________________________________________________.

Q3) Give four effects of force. Write one example of each.

Q4) Name

a) the force exerted by all matter on all other matter

b) the force which tends to slow down objects or keep them from moving

c) the force with which a charged body attracts an uncharged body.

Q5) An example of a contact force is

1) Magnetic force

2) Frictional force

3) Gravitational force

4) All of these

Q6) A Force cannot change the

1) Speed of an object

2) Mass of an object

3) Shape of an object

4) The direction of a moving object

Q7) The pull of the earth is a force called

a) Gravitational force

b) Frictional force

c) Electrostatic forces

d) None of these

Q8) If a force is applied on a smaller area of contact, the pressure exerted by it is

1) Greater

2) Lesser

3) The same

4) None of these

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