- #1
kello2008
- 2
- 0
FIRST PROBLEM
A skier of mass 70 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 60m up a 30 degree slope (assumed frictionless) at a constant speed of 2.0 m/s? (b) What power must a motor have to perform this task?
I am not sure what they should be.
I do not know where to begin and with what equations.
SECOND PROBLEM!
A 50.0-kg student climbs a 5.00-m-long rope and stops at the top. (a) What must her average speed be in order to match the power output of a 200 W light bulb? (b) How much work does she do?
I do not know where to begin.
I do not have an attempt.
Thanks for your time and help.
Homework Statement
A skier of mass 70 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 60m up a 30 degree slope (assumed frictionless) at a constant speed of 2.0 m/s? (b) What power must a motor have to perform this task?
Homework Equations
I am not sure what they should be.
The Attempt at a Solution
I do not know where to begin and with what equations.
SECOND PROBLEM!
Homework Statement
A 50.0-kg student climbs a 5.00-m-long rope and stops at the top. (a) What must her average speed be in order to match the power output of a 200 W light bulb? (b) How much work does she do?
Homework Equations
I do not know where to begin.
The Attempt at a Solution
I do not have an attempt.
Thanks for your time and help.