What is the formula for calculating mechanical power

What difference is there between the downward velocities of the skydiver who jumped out of the helicopter (with no forward velocity) and the one who jumped out of a plane

A bowling ball of mass 8 kg hits a wall going 5 m/s and rebounds at a speed of 4 m/s. What was the impulse applied to the bowling ball?

Question 13 4 pts Whenever Eli walked past the sunglass kiosk right outside the mall food court, he would the smell cinnamon rolls baking in one of the food stands, and start to salivate.

Many years ago, people believed that the sun rotated around the earth. Eventually, evidence was discovered that indicated this idea might not be accurate. What was the likely result of this discovery?

Calculate the angle of refraction of 30.0° light shines from water into ice. The indices of refraction for water and ice are 1.36 and 1.31, respectively.

Two copper wires with different diameters are joined end to end. If a current flows in the wire combination, what happens to electrons when they move from the larger-diameter wire into the smaller-diameter wire?

A baseball player is warming up and tosses a ball straight up into the air. The ball travels up until it reaches some maximum height, and then falls back down to the player/'s hand.

Volume can be measured in liters or cubic meters. a. T b. F

A spring with a spring constant of 1200 N/m has a 55-g ball at its end. The energy of the system is 5.5J. What is the amplitude of vibration?

Force F1 acts on a particle and does work W1. Force F2 acts simultaneously on the particle and does work W2. The speed of the particle does not change. Which one of the following must be true? a. W1 is zero, and W2 is positiveb. W1 = - W2c.