1. A weight lifter raises a 1000 N weight a vertical distance of 2.00 m in a time interval of 2.00s. Calculate the power provided by the weight lifter's force. 2. A 1.00 kg block starts at 2m/s at the top of a 20.0 m long 30 incline. Its speed just before touching the ground is 13 m/'s. How much work is done by friction?3. A 1200 kg car driving downhill goes from an altitude of 70 m to 40 m above sea level and accelerates from 11 m/'s to 23 m's. i. How much potential energy did the car lose? ii. How much kinetic energy did it gain? 111. How much energy seems unaccounted for? IV . Where did this energy go?4. A 45 kg box is pushed up a 21 m ramp at a uniform speed. The top of the ramp is 3.0 m higher than the bottom. i. What is the potential energy of the box at the top of the ramp relative to the bottom of the ramp? ii. What work was done pushing the box up the ramp if friction were negligible? ili. What work was done pushing the box up the ramp if the force of friction between the box and the ramp was 100 N