# Physics

You build a toy model of a water slide. A red 225 g toy car slides down a 40 degree frictionless ramp. At the bottom, just at it exists onto a horizontal part of the slide, it collides with a purple 450 g car at rest. How high should you make the water slide so that the red toy car gives the purple car a speed of 200 cm/s? Assume the collision is perfectly elastic.

1. (1/2) m u^2 = m g h
so u = sqrt (2 g h) (remember that, use it all the time)
so
to get u
momentum
.225 u = .225 u' + .450 kg * 2 m/s
and energy
(1/2)(.225 ) u^2 = (1/2)(.225) u'^2+ (1/2)(.450)(4)
once you have u, you can find gh

posted by Anonymous

## Similar Questions

1. ### Physics

You build a toy model of a water slide. A red 250 g toy car slides down a 40 degree frictionless ramp. At the bottom, just at it exists onto a horizontal part of the slide, it collides with a purple 500 g car at rest. How high
2. ### Integrated Chem/Phys

If the density of a 225g stuffed plush toy is 1.25g/cm^3 and the water volume in a glass is 25 ml, find the new level of water after the toy is pushed under water. I know that D=m/v so 1.25=225/v so 1.25/225=v so I got .005 which
3. ### physics

A bath toy is floating stationary in water such that half of the toy is above water and half of the toy is below the water. A kid pulls the toy 3.9 cm down into the water and then lets go. The toy then proceeds to bob up and down.
4. ### Geometry

Joey has a toy car that is a 1:64 scale model of an actual car. (In other words, the length of the actual car is 64 times as long as the length of the toy car.) Joey's toy car can go 5 feet per second. What is the equivalent speed
5. ### Physics

A bath toy is floating stationary in water such that half of the toy is above water and half of the toy is below the water. A kid pulls the toy 3.9 cm down into the water and then lets go. The toy then proceeds to bob up and down.
6. ### Maths

5 kids (A, B, C, D and E) are playing games in the playground. In each round, they follow the rules below to pass on the toy on their hands to the next kid: A→C, B→E, C→A, D→B, E→D. Initially, A and B are holding the car
7. ### Math

The supply and demand for a business manufacturing toy cars are given by these two equations, where y is the price in dollars per item and x is the number of toy cars sold in thousands. Supply: y = x^2 − x + 0.5 Demand: y =
8. ### physics

A toy car (200 g) moves by shooting a plastic ball (50 g) horizontally out the back. The average acceleration of the car is 1.2 m/s 2 [E] and there is negligible friction acting on each part of the toy. T / I C (a) Draw an FBD for
9. ### physics

A toy car (200 g) moves by shooting a plastic ball (50 g) horizontally out the back. The average acceleration of the car is 1.2 m/s2 [E] and there is negligible friction acting on each part of the toy. (a) Draw an FBD for each
10. ### Math

Mark had red toy cars and blue toy cars in a box. The ratio of the blue toy cars to the red toycars was 5:2. when Mark put 15 more blue toy cars in the box, the ratio of the blue toy cars to the red toy cars became 4:1. How many

More Similar Questions