Luke pulls a sled using a force of 65 N for a distance of 25 m across level ground. The rope Luke pulls forms an angle of 25° with the ground. About how much work does Luke do on the sled? 250 J 690 J 1,500 J 1,600 J

A sprinter accelerates from rest to 10.0 m/s in 1.30s. what is the acceleration in m/s2?

Three clues that indicate a chemical change

If you push against a stationary object for 10 seconds, you have performed an: a. eccentric exercise. b. isokinetic exercise. c. isometric exercise. d. isotonic exercise

Which of the following statements describe the transfer of energy? -Collisions of atoms causing nuclear reactions -A car speeding up from 5 mi/hr to 40 mi/hr -A weightlifter lifting 100 lb.

At a construction site, the site manager notices that a crane takes 20 seconds to lift a 500kg steel beam up to a height of 15 meters. From this information, he calculates the power output of the crane to be what value?

A magnet is pushed into the center of a wire loop and then stops. what is the current in the wire loop when the wire stops moving? explain.

Which feature do highland climates have that lower elevation area do not? A tundra where there are no trees A tree line beyond which trees do not grow Permafrost, or a part of the ground that is permanently frozen An ice cap, or a permanent cover of

As shown in the figure below, Cindy rushes 30 mtoward her truck. She notices she forgot her lunch and returns back to the house. Her total travel time is 90s a. What is Cindy's average velocity over the 90s period? b.

Un atleta que recorre 100 m en 12 s

Assuming equal rates of acceleration in both cases, how much farther would you travel if braking from 59 mi/h to rest than from 25 mi/h?