The graph below shows the velocity of an object of mass 1 g. Each line on the ti

Question

The graph below shows the velocity of an object of mass 1 g. Each line on the time axis represents 1 s and each line on the velocity axis represents 3 m/s. Which of the following statements, describing the graph below are true? (If A and E are true, and the others are not, enter TFFFT).

A) In section D, the force is always positive.
B) In section B, the force is constant and non-zero.
C) In section C, the force is negative.
D) In section D, the displacement is positive.
E) In section A, the force acts opposite to the direction of the velocity

Explanation / Answer

A) F, bacause speed first increases and then decreases. So force first increses and then decreases to negative direction.

B) F , beacause speed does not change in section B so acceleration is Zero .so force is Zero.

C) F, in section C velocity increase so acceleration positive .so force is positive.

D)  T , Displacement is positive beause the body is always moving forward and not going back at any point of time.

E) F, because the force acts in the direction of the velocity. velocity increase with the time in section A.

so the answer is FFFTF.

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