A 12.5-kg crate slides along a horizontal frictionless surface at a constant speed of 4.0 m/s. The crate then slides down a frictionless incline and across a second horizontal surface as shown in the figure. 4.0 m/s Reference: Ref 6-5 3.0 m 4.0m What is the kinetic energy of the crate as it slides on the lower surface? ○290J 320 J 370 J 0470 J O570 J

A daredevil on a motorcycle leaves the end of a ramp with a speed of 32.4 m/s as in the figure below. If his speed is 30.5 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.m

The roller coaster has a PE of 10,000 J when it begins its downhill run. How much total energy does it have when it is halfway down the hill?   Which answer below is correct 10,000 J 5,000 J 10,000 N 5,000 N

Vx vx (m/s) 2 A 0 A -2 200evin Bə BCDE F t The diagram is the velocity-versus-time graph for a 3.10 kg object moving along the x-axis. Determine the work (in J)done on the object during the time interval AB. Submit Answer Tries 0/10 Determine the work (in J)done on the object during the time interval BC. Submit Answer Tries 0/10 Determine the work (in J)done on the object during the time interval CD. Submit Answer Tries 0/10 Determine the work (in J)done on the object during the time interval DE. Submit Answer Tries 0/10 Determine the work (in J)done on the object during the time interval EF. Submit Answer Tries 0/10 T

In the figure below, a block of ice slides down a frictionless ramp at angle 0 = 50° while an ice worker pulls on the block (via a rope) with a force Fr that has a magnitude of 45 N and is directed up the ramp. As the block slides through distance d = 0.31 m along the ramp, its kinetic energy increases by 60 J. How much greater would its kinetic energy have been if the rope had not been attached to the block? ---Select--- F. A

An iceboat is at rest on a frictionless frozen lake when a sudden wind exerts a constant force of 200 N, toward the east, on the boat. Due to the angle of the sail, the wind causes the boat to slide in a straight line for a distance of 9.3 m in a direction 26° north of east. What is the kinetic energy of the iceboat at the end of that 9.3 m? Number Units

A 2.1 x 10³-kg car starts from rest at the top of a 5.1-m-long driveway that is inclined at 18° with the horizontal. If an average friction force of 4.0 x 103 N impedes the motion, find the speed of the car at the bottom of the driveway. m/s Submit Answer

A 7.5 kg box initially at rest on a horizontal surface is pushed by a constant force of 34.2 N that is applied at angle 35.6° below the horizontal. As the box accelerates along the surface, it encounters a frictional force of 16.6 N. Using work-energy theorem, what is the speed of the box after it has traveled 4.75 m? vf V₁ = 0 d- 5.93 m/s 4.72 m/s 7.50 m/s 3.77 m/s m