78kg*9.8m/s2 what is the force

A ball is released from a hot air balloon moving downward with a velocity of - 10.0 meters/second and a height of 1,000 meters. How long did it take the ball to reach the surface of Earth? Given: g = - 9.8 meters/second2

Now that the first three step have been explained, identify the next three steps, in order. Step 4: Step 5: Step 6:

a group of elements that stretch bend and conduct heat and electricity

You're driving down the highway late one night at 16m/s when a deer steps onto the road 44m in front of you. Your reaction time before stepping on the brakes is 0.50s, and the maximum deceleration of your car is 10m/s2.

A 1250 kg car starts from rest and speeds up to 14.0 m/s in 7.25s. How much force acted on the car?

A heat pump absorbs heat from the atmosphere at a rate of 30 kW. If work is being done to run this heat pump at a rate of 7.7 kW, what is the coefficient of performance (COP) of the heat pump? A) 2.9B) 22C) 0.26D) 3.9E) 4.9

How do astronomers think the sun may have begun

Two identical objects are pressed against two different springs so that each spring stores 55.0J of potential energy. The objects are then released from rest.

As the band passed by, the beating drums and trumpets made Billy feel like his body was beating with the music.

Starting from rest, a solid sphere rolls without slipping down an incline plane. At the bottom of the incline, what does the angular velocity of the sphere depend upon?