During a test crash, a 1,450kg sedan accelerates from rest at a constant acceleration of 5m/s^2 for 20m until it collides with a concrete wall. What
is the change in kinetic energy when the car strikes the wall and comes to
a stop?

Ablock of steel has a density of 0.29lbs per cubic inch. if the block has dimensions of 1 inch by 1 inch by 3 inches, what is its weight? a. 0.29lbs b. 0.58lbs c. 0.87lbs d. 1lbs

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

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)