2. A car accelerates from rest at a rate of 6 m/s^2 until it has traveled a total of 42 m. a). What is the velocity of the car once it has traveled 42 m?

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

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.