A boy and girl on ice skates face each other. the girl has a mass of 20 kg and the boy has a mass of 30 kg. the boy pushes the girl backward at a speed of 3.0 m/s as a result of the push the speed of the boy is

A car with a mass of 950 kg moves at 24 m/s. What braking force is needed to bring the car to a halt in 10 s?

Explain the energy conversions that take place during combustion?

Part complete during a collision with a wall, the velocity of a 0.200-kg ball changes from 20.0 m/s toward the wall to 12.0 m/s away from the wall. if the time the ball was in contact with the wall was 60.

Which of the following situations would produce an average velocity of zero? A) a round-trip to school and back B) a horse galloping in a field C) the criss-crossing path of a flying bug D) a trip, first to the moon, then onto Mars

How to calculate speed

Does heat rise or fall

Two small, positively charged spheres have a combined charge of 5.23 x 10^-5 C. If each sphere is repelled from the other by an electrostatic force of 1.00 N when the spheres are 2.

A car racer accelerates uniformly to a velocity of 135 m/s over a distance of 412 m. Determine the acceleration of the car.

Which of the following is the medium that creates sand dunes? a. water b. wind c. ice d. gravity

How many centimeters are in 24 meters