A block is sent up an incline with a velocity of 3.51 m/s. Assume there is no friction between the incline and the block. The angle is at an incline of 31.1 degrees with the horizontal. A) How far up the incline does the block go? B) How long does it take to get there? C) What is it's speed when it gets back to the bottom?

A 19-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 21 N. Starting from rest, the sled attains a speed of 1.8 m/s in 8.1 m. Find the coefficient of kinetic friction between the runners of the sled and the snow. Number i Units

A skier starts from rest at the top of a 30o incline and slides down  100 m to the bottom of the  incline.  If the coefficient of friction  between the incline (snow) and the skier is 0.2, find the speed of  the skier when he reaches the bottom of the incline. A.) 25.3 m/s B.) 6.7 m/s C.) 35.4 m/s D.) 16.7 m/s

A box of mass 2.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 8.0 m/s for 15 m. Use g = 10 m/s2. Match the answers with questions. m v ◆ the work done on the box by its weight (WW) the work done on the box by the tension force in the cable (WT) the net work done on the box (Wnet) the final kinetic energy of the box (Kf) A. 300 J B. O J C. -240 J D.-300 J E. -64 J F. 240 J G. 64 J

A 235 kg roller coaster is at the top of a hill with a velocity of 5.60 m/s from a height of 100.0 m above the ground. A) Determine the velocity of the roller coaster at a height of 40.0 m furtherdown the track, neglecting friction.  B) What reference point did you choose as zero height? Show how you could come up with the same answer to A if you chose another reference point for height.

A 100 kg skier starts from rest at the top of a ski slope that is 50 m long. If his final speed at the bottom of the slope is 10 m/s, where the bottom of the slope is 20 m below the top, what is the approximate average force of friction between the skis and the slope? 20 m 50 m O 300 N O 1500 N ○ 600 N ○ 750 N O 150 N

The conveyor belt delivers each 14-kg crate to the ramp at A such that the crate's speed is vA = 2.5 m/s, directed down along the ramp. The coefficient of kinetic friction between each crate and the ramp is uk = 0.11. Assume that no tipping occurs. Take = 30°. (Figure 1) Figure VA-2.5 m/s < 1 of 1 Part A Determine the speed at which each crate slides off the ramp at B. Express your answer to three significant figures and include the appropriate units. V = .0 Value Submit μA Provide Feedback m/s Request Answer ?

A vehicle applies it breaks for 102 ft before departing the roadway. The roadway surface friction factor is 0.50. The vehicle continues to break on an unpaved surface with a fiction factor of 0.30, for another 30 ft. The vehicle then strikes a stationary object with an impact of 20 mph. What was the initial speed of the vehicle? The roadway and unpaved surface are level.

A 3kg block slides along a floor with coefficient of kinetic friction μk=0.3, initially moving at 7.0m/s. It travels for 2.0 meters, then encounters a ramp sloped upward at 40 degrees. The ramp also has a coefficient of kinetic friction μk=0.3. How fast is the block moving when it reaches the bottom of the ramp? How far up the ramp does the block slide, before momentarily coming to rest? a.) For each part of the problem, identify all the forces acting on the block, and draw a free body diagram. b.) Instead of using a Newton’s 2nd Law equation, write out the Work Energy Theorem for each part of the problem (that is the ΔK = W1 + W2 + … equation.) For both parts of the problem, find thework done by each force on the block and place them on the right-hand side of the equation. (In the ramp part, the magnitude of displacement is unknown, so just leave it as a variable.) c.) Solve for the final velocity in the first part of the problem, then solve for the displacement in the second part of…

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