W. B Class VIII- Test Paper

                  

TEST PAPER - 1 (Marks - 15)  Time: 30 mins.

1) Fill in the blanks (any two) (1 x 2)= 2

a) Density of a concentrated saline water is ___then that of ordinary water.

b) Frictional force does not depend on the ____ of surfacing in contact with another surface.

c) 9.8 Newton= _____ kg weight.

2) True or false (any two)   (1 x2= 2)

a) Pressure is the force applied per unit area of the surface.

b) Static friction is smaller than the sliding friction.

c) SI unit of force is Newton.

3) Match the columns: (1 x 4= 4)

Column -A.              Column -B

a) 1 litre of water    i) 1 g/cm³

b) density of water ii) 1 kg

c) mass of cc of water iii) 1000 g

d) 1 kg of water        iv) 1 g

4) Answer the following: (Any two ) ( 1 x 2= 2)

a) Name the instrument is used to measure the weight of an object.

b) Name the instrument is used to measure the air pressure.

c) How do you measure force?

5) Answer any one (2 x 1= 2)

a) State Archimedes principle

Or

State Newton's law of motion

6) Solve the numerical (any two) (1.5 x 2= 3)

a) A body of mass 200g is moving with a velocity of 10cm/s. Calculate the force required to stop it in 10 seconds.

b) A force of magnitude 15N is acting on an object of mass 10 kg. What will be the magnitude of acceleration of the object produced by the force ?

c) A tumbler contents 5 kg of water. The area of the base of the tumblr is 0.2 square metre. What is the pressure applied by the water on the base of the Tumbler.