science
Grade-7
Easy

Question

A car is moving on a road. What are the forces acting opposite to its direction of motion?
A) Frictional force
B) Force exerted by the engines
C) Air resistance
D) Force exerted by the brakes

  1. Only a and c
  2. Only a, c, and d
  3. Only a, b, and c
  4. All of those

hintHint:

See the forces which supports and opposes the motion.

The correct answer is: Only a, c, and d


    • There are forces which supports car motion and opposes it.
    • Frictional force opposes the motion.
    • Air resistance also opposes the motion.
    • Force of engines moves the car and supports the motion.
    • Brakes opposes the motion and slows down the car.
    • So, the correct option is b.
    Figure shows direction of forces on a car.

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