A 20 kg mass with an initial velocity of 10 m/s slides to a stop in 2 meters. What is the net work down on the mass? a.) 250 J b.) 500 J c.) 120 J d.) 20 J e.) None of the above

A model airplane with mass 0.741 kg is tethered to the ground by a wire so that it flies in a horizontal circle 30.5 m in radius. The airplane engine provides a net thrust of 0.804 N perpendicular to the tethering wire.

A curve of radius 40 m is banked so that a 1100 kg car traveling at 40 km/h can round it even if the road is so icy that the coefficient of static friction is approximately zero. The acceleration of gravity is 9.81 m/s 2.

Sound waves, water waves, and light waves are all alike in that they all

A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 10.5 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 69.

Which statement best describes the direction of the buoyant force on any object? A. opposite the force of gravity B. in the same direction as the weight C. in the direction of motion of the object D. opposite the direction of motion of the object

A car travels at 40km/hr for 2 hours and at 55 km/hr for 2 hours. How far has the car traveled? What is its average velocity?

The comparison of work output to work input is called the mechanical. advantage ... a. true. b. false

Bob, Jill, Kim, and Steve measure an object's length, density, mass, and brightness, respectively. Which student must derive a unit of measurement? A. Bob B. Jill C. Kim D. Steve

Scientist have changed the model of the atom. what experimental evidence led them to change from the previous model.

A 20 kg mass with an initial velocity of 10 m/s slides to a stop in 2 meters. What is the net work down on the mass? a.) 250 J b.) 500 J c.) 120 J d.) 20 J e.) None of the above