Class 04 EVS Work Force And Energy CBSE Questions & Answers

Class 4 · EVS Work Force And Energy

This is Science and Social Science (EVS) class 04 EVS Work Force and Energy CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Force of friction always acts on moving objects and its direction shall be
  • A
    Opposite to the direction of motion
  • B
    Perpendicular to the direction of motion
  • C
    On any direction
    Correct
  • D
    Along the direction of motion
2
The instruments that make our work easier are called
  • A
    Generator
  • B
    Machine
    Correct
  • C
    Motor
  • D
    Electric current
3
Whenever a force makes a body to move, then ____________ said to be done.
  • A
    Energy
  • B
    Power
  • C
    Motion
  • D
    Work
    Correct
4
All living things obtain energy from ______________.
  • A
    Light
  • B
    Electricity
  • C
    Food
    Correct
  • D
    Muscles
5
S.I unit of work is
  • A
    Millimeter
  • B
    Newton
  • C
    Joule
    Correct
  • D
    Kilogram
6
Which force enables us to perform all activities involving movement or bending of our body?
  • A
    Magnetic force
  • B
    Muscular force
    Correct
  • C
    Electrostatic force
  • D
    Frictional force
7
____________ is needed to pull or push something.
  • A
    Force
    Correct
  • B
    Motion
  • C
    Energy
  • D
    Power
8
Which type of energy is used in using device given below
Question 8 figure 1
  • A
    Light energy
  • B
    Heat energy
  • C
    Chemical energy
  • D
    Muscular energy
    Correct
9
Kinetic energy of a body increased when ____________ is increased.
  • A
    Velocity
    Correct
  • B
    Colour
  • C
    Size
  • D
    Shape
10
________________ is a tool or device that helps us to make task easier.
  • A
    Light
  • B
    Machine
    Correct
  • C
    Force
  • D
    Electricity
11
Which of the following is a complex machine?
  • A
    Lever
  • B
    Hammer
  • C
    Pulley
  • D
    Sewing machine
    Correct
12
What do you do to slow down a bicycle?
  • A
    Apply brakes
    Correct
  • B
    Pedal fast
  • C
    Ride it standing
  • D
    Jump off the bicycle
13
What is used when force is applied?
  • A
    Heat
  • B
    Energy
    Correct
  • C
    Light
  • D
    Friction
14
Tools like the needle and hammer are
  • A
    Modern machine
  • B
    Complex machines
  • C
    Simple machines
    Correct
  • D
    Electrical machines
15
Fuels are the source of light and ______________ energy.
  • A
    Heat
    Correct
  • B
    Potential
  • C
    Kinetic energy
  • D
    Sound