The sledder shown in the figure starts from the top of a frictionless hill and slides down into the valley.  What initial speed Vi does the sledder need to just make it over the next hill?  Assume that the sledder reaches the very peak of the second hill at a very small speed like v=0.

A 899 kg car accelerates from rest up to 26.0 m/s in 6.14 s. What is the average power output of this engine during this time? Number Units (for comparison information there are 746 W for each horse power )

Solution to HW problem with all work and explanation, please.

A 1400 kg car delivers a constant 42 hp to the drive wheels. We assume the car is traveling on a level road and that all frictional forces may be ignored.Calculate the car's acceleration when its speed is 20 m/s

Maria sets up a simple track for her toy block  (m = 0.30 kg)  as shown in the figure below. She holds the block at the top of the track, 0.54 m above the bottom, and releases it from rest.   (a) Neglecting friction, what is the speed of the block when it reaches the bottom of the curve (the beginning of the horizontal section of track)? m/s(b) If friction is present on the horizontal section of track and the block comes to a stop after traveling 0.80 m along the bottom, what is the magnitude of the friction force acting on the block? N

Please don't provide handwritten solution.....

0.50 kg - V% = 1.5 m/s r=0.95 m 2.0 m 1.9 m A toy roller coaster is shown above. Ignore friction except where indicated. (a) If the speed of the cart at the top of the first hill is 1.5 m/s, calculate its speed at point A.

= 7.50 m. The figure below shows a box with a mass of m = 7.10 kg that starts from rest at point A and slides on a track with negligible friction. Point A is at a height of ha A MET 3.20 m 2.00 m m ha (a) What is the box's speed at point B (in m/s)? m/s What is the box's speed at point C (in m/s)? m/s (b) What is the net work (in J) done by the gravitational force on the box as it moves from point A to point C?

A bead with a hole through it slides on a wire track. The wire is threaded through the hole in the bead, and the bead slides without friction around a loop- the-loop (see figure below). The bead is released from rest at a height h = 3.00R. h (a) What is its speed at point A? (Use the following as necessary: the acceleration due to gravity g, and R.) V = (b) How large is the normal force on the bead at point A if its mass is 4.10 grams? magnitude N direction upward (c) What If? What is the minimum height h from which the bead can be released if it is to make it around the loop? (Use any variable or symbol stated above as necessary.) h =

A daredevil on a motorcycle leaves the end of a ramp with a speed of 29.0 m/s as in the figure below. If his speed is 27.3 m/s when he reaches the peak of the path, what is the maximum height that he reaches? Ignore friction and air resistance.