I. FILL IN THE BLANKS:-( 3 marks)
a) Volume of a cuboid is _____.
b) The rate of change of motion in a specified direction is called _____.
c) The capacity to do work is called _____.
2. GIVE ONE WORD FOR THE FOLLOWING:-( 3 marks)
a) Amount of matter in an object.
b) Standard unit of energy.
c) Ratio of the distance travelled by a body to the time taken to do so.
3. DEFINE THE FOLLOWING TERMS:-(4 marks)
a) uniform motion b) density
4. ANSWER THE FOLLOWING QUESTIONS:- ( 10 marks)
a) Identify the types of motion: (2 marks)
i. Motion of an electric fan.
ii. Revolution of earth around the sun .
b) What do you mean by 1 joule ? ( 2 marks)
c) What is volume? Write the standard unit of volume. ( 2 marks + 1 mark)
d) Distinguish between kinetic energy and potential energy. ( 3 marks)
Answers
Answer:
l x b x h
1 joule
circular motion
Answer:
1.
a) L×B×H
b) acceleration
c) energy
2.
a)Mass
b)Joule
c)motion
3.
a) This type of motion is defined as the motion of an object in which the object travels in a straight line and its velocity remains constant along that line as it covers equal distances in equal intervals of time, irrespective of the duration of the time.
b) mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density can also be expressed as kilograms per cubic metre (in MKS or SI units)
4
a)
i. rotational or circular
ii.the Earth spins on its axis, it also orbits, or revolves around the Sun. This movement is called revolution.
b).
One joule of work is done on an object when a force of one newton is applied over a distance of one meter.
c).
Volume is the quantity of three-dimensional space enclosed by a closed surface,
si unit of volume is meter cube .
d).
Potential Energy is the stored energy in an object or system because of its position or configuration. Kinetic energy of an object is relative to other moving and stationary objects in its immediate environment.