Workers do 8,000J of work on a 2,000-N crate to push it up a ramp. If the ramp is 2 m high, then what is the efficiency of the ramp?

Aspaceship starting from a resting position accelerates at a constant rate of 9.8 meters per second per second. how far will the spaceship travel if its final speed is 1 percent the speed of light (300,000,000 m/s)? a. 3.1 × 106 m b. 2.94 × 108 m c. 7.8 × 1010 m d. 4.6 × 1013 m