science
Grade-7
Easy

Question

Find the net force on the car. The various forces associated with the car are given below.

  1. 473 N
  2. 661 N
  3. 452 N
  4. 409 N

hintHint:

Net force is equal to the difference between the forward and backward forces.

The correct answer is: 409 N


    • Forward force is due to engine which is 567N.
    • Backward force is due to air resistance and friction which is 32N and 126N respectively.
    • Means total backward force is 32N+126N= 158N. Which is less than the forward force.
    • Therefore, net forward force will be 567N-158N= 409N.
    • So, correct option is d.

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