11. A block of mass mi 2.40 kg is connected to a second block of mass m2 = 1.80 kg, as shown in the sketch. When the blocks are released from rest, they move through a distance d = 0.500 m, at which point m₂ hits the floor. Given that the coefficient of kinetic friction between m₁ and the horizontal surface is μ = 0.450, find the speed of the blocks just before m₂ lands. A 1111 m, -0

1. Sam, whose mass is 75 kg, takes off across level snow on his jet-powered skis. The skis have a thrust of 200 N and a coefficient of kinetic friction on snow of 0.10. Unfortunately, the skis run out of fuel after only 10 s. A. What is Sam’s top speed? B. How far has Sam traveled when he finally coasts to a stop?

Suppose I need to  toss an object of mass 5.2 up onto a shelf 5.94 meters above where my hands can reach. What is the minimum speed of toss necessary to do this? Your answer should be in meters per second, but don't write teh unit, just the number. You can approximate the acceleration due to gravity at the earth's surface as 10 meters per square second.

A block is launched up a 3.75 m high frictionless inclined plane (0 = 35.0°) with an %3D initial speed of vo = 12.5 m/s as shown in the figure below. (a) What is the block's %3D speed as it leaves the ramp? (b) How far from the base of the ramp does the block land? (Air resistance is negligible) Vo=12.5 m/s 3.75 m 0= 35.0° X= ?

A horizontal force of 80.0 N is applied to a 5.00 kg block as the block slides a distance of 0.800 m along a horizontal floor. The coefficient of kinetic friction between the floor and the block is 0.500. If the block is initially at rest, how fast is it moving at the end of the displacement?

Marisa pushes a 1.635 kg book across a table, accelerating it at a rate of 2.099 m/s^2 over a time period of 1.891 s. If 2.760 watts of power were used to move the book, what distance does the book travel across the table?

You throw a rock of mass 0.750 kg straight up in the air with an initial speed of 20.0 m/s. Throughout the flight of the rock assume there’s a constant air resistance force of magnitude 1.25 N acting on it. The trajectory of the rock is vertically up and down, with no horizontal motion. (a) What is the maximum height reached by the rock?  (b) What is the speed of the rock when it returns to the point of release?

44. A 15 kg child slides, from rest, down a play- ground slide that is 4.0 m long, as shown in the figure. The slide makes a 40° angle with the horizontal. The child's speed at the bot- tom is 3.2 m/s. What was the force of friction that the slide was exerting on the child? 傳 4.0 m 40°

Denisse is playing a pinball machine. she notices that the 0.012 kg ball is shot from the plunger and moves into a circular path with a radius of 0.22 m. if the magnitude of the force necessary to keep the ball in the Circular path is 0.030 N, what is the speed of the steel ball?

A baseball is thrown from the roof of h = 22.0 m-tall building with an initial velocity of magnitude 10.3 m/s and directed at an angle of 53.1 ∘above the horizontal. Part A. What is the speed of the ball just before it strikes the ground? Use energy methods and ignore air resistance. Part B.What is the answer for part (A) if the initial velocity is at an angle of 53.1 ∘ below the horizontal? Part C.If the effects of air resistance are included, will part (A) or (B) give the higher speed? The part (A) will give the higher speed. The part (B) will give the higher speed.