- #1

jgoff14

- 16

- 0

Ive got two problems that are driving me crazy

3. A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are μs = 0.40 and μk = 0.30, respectively. The puck's initial speed is 96 m/s. What vertical height does the puck reach above its starting point?

4. The figure shows a 100 kg block being released from rest from a height of 1.0 m. It then takes 0.76 s to reach the floor. What is the mass of the block on the left?

(attached pic)

f=ma

i dont really have an attempt just a bunch of notes and calculations but i dont know how to bring it together

N=9.8*200sin(300) => 980n

well im looking over it and dont have anything more than that i cant even tell what i was doing before. PLEASE help

## Homework Statement

3. A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction between the hockey puck and the metal ramp are μs = 0.40 and μk = 0.30, respectively. The puck's initial speed is 96 m/s. What vertical height does the puck reach above its starting point?

4. The figure shows a 100 kg block being released from rest from a height of 1.0 m. It then takes 0.76 s to reach the floor. What is the mass of the block on the left?

(attached pic)

## Homework Equations

f=ma

## The Attempt at a Solution

i dont really have an attempt just a bunch of notes and calculations but i dont know how to bring it together

N=9.8*200sin(300) => 980n

well im looking over it and dont have anything more than that i cant even tell what i was doing before. PLEASE help