What is the energy ?E required to accelerate a 1645 kg1645 kg car from rest to 27 m/s? Compared to the amount of energy required to accelerate a car from rest to 27 m/s,27 m/s, how much energy is required to accelerate the car from 27 m/s27 m/s to twice that speed, 54 m/s?

. In the annual Empire State Building race, contestants run up 1,575 steps to a height of 1,050 ft. In 2003, Australian Paul Crake completed the race in a record time of 9 min and 33 S, Mr., Crake weighed 143 lb (65 kg) , (a) How much work did Mr., Crake do in reaching the top of the building? (b) What was his average power output (in ft-lb/s and in hp)?

A single force F(x)=4.0x (in newtons) acts on a 1.0-kg body. When x=3.5 m, the speed of the body is 4.0 m/s. What is its speed at x = 2.0 m?

. At NASA's Zero Gravity Research Facility in Cleveland, Ohio, experimental payloads fall freely from rest in an evacuated vertical shaft through a distance of 132 m, (a) If a particular payload has a mass of 45 kg, what is its potential energy relative to the bottom of the shaft? (b) How fast will the payload be traveling when it reaches the bottom of the shaft? Convert your answer to mph for a comparison to highway speeds.

Integrated Concepts (a) What force must be supplied by an elevator cable to produce an acceleration of 0.800 m/s2 against a 200-N frictional force, if the mass of the loaded elevator is 1500 kg? (b) How much work is done by the cable in lifting the elevator 20.0 m? (c) What is the final speed of the elevator if it starts from rest? (d) How much work went into thermal energy?

. The fastest that a human has run is about 12 m/s. (a) If a pole vaulter could run this fast and convert all of her kinetic energy into gravitational potential energy, how high would she go? (b) Compare this height with the world record in the pole vault.

What is the energy E required to accelerate a 1445 kg car from rest to 29 m/s? Compared to the amount of energy required to accelerate a car from rest to 29 m/s, how much energy is required to accelerate the car from 29 m/s to twice that speed, 58 m/s? twice as much O four times as much C he same O three times as much मন

An 1800-kg car initially travels at 130 km/h and stops over a time of 30 s. During this time the car's height is reduced by 10 m. Assuming that the mass of the car does not change, what is the change in total energy of the car in kJ? Assuming that all of this energy change can be captured, how much power would be produced, in kW? Assume that gravity is 9.81 m/s2.

Please solve and answer the question correctly. Thank you!

Thor stands on the top of stark tower 425 m adn fights his brother loki using mjolnir his hammer. if his hammer has a mass equal to 300 billion elephants  cal it 4.5*10^15 kg what i the gaviation potential energy in J of jjolnir relative to the ground? use scientific notation to enter you answer. B. Loki tricks thor into dropping Mjolnir off stark tower. when the hammer has fallen one third of the way down the tower what is its kinetic energy in J? Hint you could find the speed then calculate the kinetic energy but there's an easier way...