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Mechanics MCQs.

What is the formula for kinetic energy?

a) KE = 1/2 mv^2 b) KE = mgh c) KE = Fd d) None of the above.
Answer: a) KE = 1/2 mv^2

What is the formula for potential energy?

a) PE = 1/2 mv^2 b) PE = mgh c) PE = Fd d) None of the above.
Answer: b) PE = mgh

What is Newton's law of universal gravitation?

a) F = ma b) F = G(m1m2)/r^2 c) F = -kx d) None of the above.
Answer: b) F = G(m1m2)/r^2

What is the formula for work done?

a) W = Fd b) W = mgh c) W = 1/2 mv^2 d) None of the above.
Answer: a) W = Fd

What is the formula for power?

a) P = W/t b) P = Fd c) P = mgh d) None of the above.
Answer: a) P = W/t

What is the law of conservation of energy?

a) Energy cannot be created or destroyed, only transferred or transformed. b) The total momentum of a system remains constant if there are no external forces acting on it. c) The total angular momentum of a system remains constant if there are no external torques acting on it. d) None of the above.
Answer: a) Energy cannot be created or destroyed, only transferred or transformed.

What is the formula for momentum?

a) p = mv b) p = Fd c) p = mgh d) None of the above.
Answer: a) p = mv