Stuck on some Physics, help please (Work and Energy)?

Click For Summary
SUMMARY

This discussion focuses on solving physics problems related to work and energy, specifically involving skeleton racers and ski lifts. The first problem requires calculating the speed of a rider at the bottom of a 104m track, assuming no nonconservative forces. The second problem involves determining the average power exerted by a ski lift that raises four skiers, each with a mass of 65kg, to a height of 140m in 2.0 minutes. Key formulas include the conservation of energy for speed calculation and the relationship between power, work, and time for the ski lift scenario.

PREREQUISITES
  • Understanding of gravitational potential energy and kinetic energy principles
  • Familiarity with the formula for power: Power = Work / Time
  • Basic knowledge of units of measurement in physics (meters, kilograms, seconds)
  • Ability to perform calculations involving mass, height, and speed
NEXT STEPS
  • Study the conservation of mechanical energy in physics
  • Learn how to calculate gravitational potential energy and kinetic energy
  • Explore the concept of power in physics and its applications
  • Practice solving problems involving work, energy, and power in real-world scenarios
USEFUL FOR

Students studying physics, educators teaching work and energy concepts, and anyone looking to enhance their problem-solving skills in mechanics.

Marcelgluch
Messages
8
Reaction score
0
Stuck on some Physics, help please! (Work and Energy)?

K this first one I am not sure how to do it.. i did the second part, that's because i had all the variables but in this one i dont...

ok this is about skeleton racers... the track total height is 104m, in the absence of nonconservative forces, such as friction and air resistance, what would be the speed of a rider at the bottom of the track? ignore initial velocity since its relatively small.

and

In 2.0min a ski lift raises four skiers at constant speed to a height of 140m. the average mass of each skier is 65kg. what is the average power provided by the tension in the cable pulling...

i know what to but i just can't figure out the Work... i know that power = work/time.. so if i could get some help that would be greatly appreciated!
 
Physics news on Phys.org


can someone please help me understand these two problems??
 

Similar threads

Solving for Ski Jumper Takeoff Speed: Using Energy and Motion Equations
  • · Replies 1 ·
Replies
1
Views
2K
Loop problem with skier on ramp going into a loop-the-loop
  • · Replies 13 ·
Replies
13
Views
2K
Work done during a collision -- Change in Kinetic Energy & change in Momentum
  • · Replies 1 ·
Replies
1
Views
2K
Calculating Speed on an Incline Using the Law of Conservation of Energy
  • · Replies 5 ·
Replies
5
Views
2K
Work and Energy on a Slope - How Does a Block Move Up with Zero Net Work?
  • · Replies 3 ·
Replies
3
Views
2K
Help finding distance using work and velocity
  • · Replies 5 ·
Replies
5
Views
1K
How Much Work to Fill a Cylindrical Tank with Water?
  • · Replies 22 ·
Replies
22
Views
3K
The Energy and Efficiency of Cross-Country Skiing: A Mathematical Analysis
  • · Replies 3 ·
Replies
3
Views
3K
Work, Energy, Power Problems: No Mass? No Speed?
  • · Replies 4 ·
Replies
4
Views
8K
Problem involving a skier, friction and conservation of energy
  • · Replies 2 ·
Replies
2
Views
4K