Question

1. 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 a moving
object
2. What does the following figure show
Water exerts pressure in all directions
The pressure or a liquid is equal at the same height or depth
Pressure of the liquid increases with the depth
None of the above
(d)Gravitational force
3. The force involved in falling an apple from a tree is
(a) Magnetic force (b) Contact force (c) Electrostatic force
(d) Cannot say
4. As we go to higher altitude the atmospheric pressure
(a)lncreases (b) Decreases
(c) Remains same
(d)in all directions
5. Some kerosene oil is kept in a container. It will exert pressure
(a)Downwards only (b) Sideways only (c)Upwards only
6. Fill in the blanks:
SI unit of force is
b. The direction of force of friction is always
to the direction of motion.
The north pole of a magnet the north pole of another magnet.
d
A drinking straw works on the existence of pressure.
Force acting on a unit area is called
e.
7. Why does a boat come to rest, if we stop rowing it?
8. Write an activity to show that liquids exert equal pressure at the same depth.
​

Answer 1

Answer:

1)option-c

2) don't know

3) gravitational force

4)b)decreases

5) a)downwards