In the figure, a 3.7 kg block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. The block's initial speed is vo = 6.3 m/s, the height difference is h = 1.2 m, and Pk = 0.588. Find d. H = 0-

A small block slides along a track from one level to a higher level, by moving through an intermediate valley (see Figure). The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distance d. Assume that the block's initial speed is 10 m/s, the height difference h is 1.6 m, and muk is 0.69. Find the distance d that the block travels on the higher level before stopping.

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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…

6. A small block slides down a frictionless track whose shape is described by y = (x^2) /d for x<0 and by y = -(x^2)/d for x>0. The value of d is 4.68 m, and x and y are measured in meters as usual. Suppose the block starts from rest on the track, at x = -1.17 m. What will the block s speed be when it reaches x = 0?     1.70 m/s     1.19 m/s     3.12 m/s     2.40 m/s

-PROBLEMS- FRICTION Do the following problems. Draw FBDs. Problems 1 - 4: Show work on a separate sheet. Problem 5: Show work on the worksheet. 1. A 1.4-kg block slides across a rough surface such that it slows down with an acceleration of 1.25 m/s2. What is the coefficient of kinetic friction between the block and the surface? 2. At a wedding reception, you notice a small boy who looks like his mass is about 25 kg running part way across the dance floor, then sliding on his knees until he stops. If the kinetic coefficient of friction between the boy's pants and the floor is 0.15, what is the friction force acting on him when he slides? 3. Joshua is playing cards with his friends, and it is his turn to deal. A card has a mass of 2.3 g, and it slides 0.35 m along the table before it stops. If the coefficient of kinetic friction between the card and the table is 0.24, what was the initial speed of the card as it left Joshua's hand? 4. An 18.0-kg box is released on a 34⁰ incline and…

An 8.0-cm-long spring is attached to the ceiling. When a 2.3 kg mass is hung from it, the spring stretches to a length of 16 cm. What is the spring constant k?

When a 10.0 kg stone is placed on a spring it displaces the spring 7.1 cm.  If the spring is pushed down another 30 cm and then released, how high above the release point does the stone go (in meters)?  Use g = 10 N/kg.  Hint:  Determine k using the force and displacement information given.

Problem A) A snow boarder starts from rest at the top of a mountain. He boards a vertical distance of 50 m down the mountain, and then he goes off a jump with a speed of 20 m/s. What must be the vertical height of the jump? Assume no friction is present. 50m h= ?

2. A 35 kg child is riding on a swing. At her highest point she is 1.8 m above the ground, at her lowest point she is 0.5 meter above the ground. Find her maximum specd in m/s