2 kg toy car moves at a speed of 5 m/s. B. If a child applies a 3 N force for 2 m in the same direction the car is already moving, how much work is done on the car?

c. What is the change in the car’s kinetic energy from the applied force?

d. What is the final kinetic energy of the car?

e. What is the velocity of the car after the child applies the 3 N force?

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

Aball is thrown upward in the air, and its height above the ground after t seconds is h ( t ) = 57 t − 16 t 2 feet. find the time t when the ball will be traveling upward at 14.25 feet per second.

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)