A 0.240-kg billiard ball that is moving at 3.00 m/s strikes the bumper of a pool table and bounces straight back at
2.40 m/s (80% of its original speed). The collision lasts
0.0150 s. (a) Calculate the average force exerted on the
ball by the bumper. (b) How much kinetic energy in
joules is lost during the collision? (c) What percent of the
original energy is left?

Sarah and michelle work at a tech company that designs exercise apps. sarah tells michelle she has heard that james, their supervisor, interviewed with a competitor and may be leaving the company, which would open up a management position. what kind of power is sarah exerting?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer