Determine which one of the following statements are always true and which one ar

Question

Determine which one of the following statements are always true and which one are always false. (T/F) When a nonconservative force is applied to a body, mechanical energy of the body is conserved. If car A collides with car B, total momentum of cars A and B together is conserved. A less massive object can never have more momentum than a more massive object In a complete inelastic collision, total momentum is conserved but not energy. SI unit for energy is watts. Gravity is a conservative force. In a longitudinal wave, the direction of oscillation is parallel to the direction of wave travel. Speed of the satellites is proportional to their altitude. Satellites that have lower altitude, must rotate faster. If a rock weighs 75 N on earth, it will be 75 N on the Mars. Law of gravitation states that gravitational force between two objects is repulsive.

Explanation / Answer

a) False

b) True

c) False

d) True

e) False (because Unit of energy is Joul)

f) True

g) False

h) False

i) False (because, Gravitational force is always attractive)

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