acceleration calculations

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Force provided by breaking system of train if it is decelerating at rate of -3 ms-2 and having mass 10,000 kg is

Force provided by breaking system of train if it is decelerating at rate of -3 ms-2 and having mass 10,000 kg is
  • A. -30,000 N
  • B. -40,000 N
  • C. -50,000 N
  • D. 30,000 N
  • Correct Answer: Option A

An object whose velocity is changing is said to be in a state of

An object whose velocity is changing is said to be in a state of
  • A. acceleration
  • B. rest
  • C. equilibrium
  • D. Brownian motion
  • Correct Answer: Option A

Gradient of velocity-time graph tells us about object’s

Gradient of velocity-time graph tells us about object’s
  • A. velocity
  • B. displacement
  • C. distance
  • D. acceleration
  • Correct Answer: Option D

If gradient of a graph is negative, then acceleration is

If gradient of a graph is negative, then acceleration is
  • A. positive
  • B. negative
  • C. zero
  • D. 1
  • Correct Answer: Option B