Determine which one of the following statements are always and which one are alw

Question

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

Explanation / Answer

a,b,c,d are correct

e) false (hp is a unit of power).

f) true (Because the path taken by the object against gravity doesn't matter).

g) true

h) false

i) false( for mars, g=3.7. So weight will be (75/9.8)3.5)

j) false (Newton's law of universal gravitation states that a particle attracts every other particle in the universe using a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.)

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