A body starts from rest and travels ‘s’ m in 2nd second, than acceleration is. 1) 2s m / s2 2) 3 s m / s2 3) 23 s m / s2 4) 32 s m / s2

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.