2. May (75 kg) and Amber (49 kg) stand motionless on ice skates, facing each other at arm's length on a smooth,
frozen pond. Which of the following actions will give Amber the least speed?
a) Amber pushes May with 500 N of force for 0.1 s.
b) Amber pushes May with 800 N of force for 0,08 s.
c) Amber pushes May with 600 N of force for 0,04 s.
d) May pushes Amber with 100 N of force for 0,6 s.
c) May pushes Amber with 300 N of force for 0.2 s.

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.