# physics

I am having great difficulty with this question.

A block is placed on a frictionless ramp at a height of 12.5 m above the ground. Starting from rest, the block slides down the ramp. At the bottom of the ramp, the block slides onto a frictionless horizontal track without slowing down. At the end of the horizontal track, the block slides smoothly onto a second frictionless ramp. How far along the second ramp does the block travel before coming to a momentary stop, as measured along the incline of the ramp?

After the block comes to a complete stop on the second ramp, it will then begin moving back down the second ramp. What is the speed of the block when it is 8.75 m, vertically, above the ground?

1. 👍
2. 👎
3. 👁
1. initial potential and total energy = E =m g h

there is no friction in this problem so the total mechanical energy stays the same

(1/2) m v^2 + m g h = E
at every height h, you can calculate v

1. 👍
2. 👎
2. We do not know the mass of block. The angle of the ramp going down is 44.3 degrees and after it goes across the horizontal surface, it goes up a second ramp at 24.5 degrees

1. 👍
2. 👎
3. The second part of the problem can be solved through the following method:
Ki+Ui=Kf+Uf, which indicates that the inital KE+initial PE=final KE+ final PE.
Because there is no inital KE or final PE, those values will both be zero. You are then left with just mgh=1/2 mv^2. You can cancel out the m from both sides. Then plug in 8.75m for the h and you will get the velocity.

1. 👍
2. 👎

## Similar Questions

1. ### physics

A 5 kg block is placed near the top of a frictionless ramp, which makes an angle of 30o degrees to the horizontal. A distance d = 1.3 m away from the block is an unstretched spring with k = 3000 N/m. The block slides down the ramp

2. ### physics

The 2 kg block in Figure 7-25 slides down a frictionless curved ramp, starting from rest at a height of h = 3 m. The block then slides d = 12 m on a rough horizontal surface before coming to rest. Figure 7-25 (a) What is the speed

a block of mass 2.50 kg rests on a ramp. if the coefficient of static friction between the block and ramp is 0.350, what maximum angle can the ramp make with the horizontal before the block starts to slip down?

4. ### physics

A mass m1 = 18.7 kg on a frictionless ramp is attached to a light string. The string passes over a frictionless pulley and is attached to a hanging mass m2. The ramp is at an angle of θ = 23.7° above the horizontal. m1 moves up

1. ### Physics

An 8.70 kg block slides with an initial speed of 1.56 m/s **down** a ramp inclined at an angle of 28.4 with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.62. Use energy conservation to

2. ### physics

A 1.9 kg block slides down a frictionless ramp, as shown in figure 8-28. The top of the ramp is 1.5 m above the ground; the bottom of the ramp is .25 m above the ground. The block leaves the ramp moving horizontally, and lands a

3. ### Physics

the only part i cant figure out is the max static friction force that acts on the block. please help show me how to find it Suppose a block with mass 2.00 kg is resting on a ramp. If the coefficient of static friction between the

4. ### physics 2

Question 1: Suppose a child of weight w climbs onto the sled. If the tension force is measured to be 58.5 N, find the weight of the child and the magnitude of the normal force acting on the sled. Question 2 : (a) Suppose a hockey

1. ### physics

A block initially at rest is allowed to slide down a frictionless ramp and attains a speed v at the bottom. To achieve a speed 3.9 v at the bottom, how many times as high h2 h1 must a new ramp be?

2. ### physics

A 20 kg mass is allowed to accelerate down a frictionless 15° ramp. a. Determine the value of the x-component of the force gravity. b. What is the acceleration of the block down the ramp. c. How long will it take for the block to

3. ### Physics

A block is placed on a frictionless ramp at a height of 14.5 m above the ground. Starting from rest, the block slides down the ramp. At the bottom of the ramp, the block slides onto a frictionless horizontal track without slowing

4. ### physics

A 3 kg block (block A) is released from rest at the top of a 20 m long frictionless ramp that is 5 m high. At the same time, an identical block (block B) is released next to the ramp so that it drops straight down the same 5 m.