Energy, work, power unit 3 question

Click For Summary
SUMMARY

The discussion focuses on solving a physics problem involving a man pulling a box with a force of 65N at an unknown angle, θ, while the box has a mass of 15 kg and accelerates at 1.27 m/s². The relevant equations include Fnet = ma and Fnet = Fcos(θ). Participants emphasize using force and acceleration components to determine the angle of pull required to achieve the specified acceleration.

PREREQUISITES
  • Understanding of Newton's Second Law (Fnet = ma)
  • Knowledge of vector components in physics
  • Familiarity with trigonometric functions related to force
  • Basic principles of dynamics and motion
NEXT STEPS
  • Study vector decomposition in physics
  • Learn about the application of trigonometric functions in force analysis
  • Explore examples of inclined force problems in dynamics
  • Review acceleration calculations in physics problems
USEFUL FOR

Students studying physics, particularly those focusing on dynamics and force analysis, as well as educators looking for practical examples of applying Newton's laws.

Dcpc10
Messages
1
Reaction score
0

Homework Statement



The diagram provided shows a man pulling a box across the floor. Assume that the force of the friction can be ignored and that the acceleration of the box is 1.27 m/s. Find the angle to the horizontal that the man must pull.

65N figure located on the rope the person is pulling
15 kg is the mass of the box
Angle is theta so basically the variable that needs to be found


Homework Equations


Fnet=ma
Fnet=Fcos[theta]
I believe these equations are involved


The Attempt at a Solution


Not sure how to put this altogether and solve. Dont have an answer sheet so i can't check the answer. :(
 
Physics news on Phys.org
Welcome to PF!

Hi Dcpc10! Welcome to PF! :wink:

Use components of force and acceleration in the horizontal direction …

what do you get? :smile:​
 

Similar threads

Work and energy of an object on a ice slope
  • · Replies 7 ·
Replies
7
Views
2K
Work of gravity on an object sliding down a frictionless sphere
  • · Replies 12 ·
Replies
12
Views
3K
Calculate the work done moving a crate
  • · Replies 3 ·
Replies
3
Views
3K
Avg Power in a Rotational Energy/Work Problem
  • · Replies 6 ·
Replies
6
Views
2K
How much work done by friction when a box w/apparent mass...?
  • · Replies 4 ·
Replies
4
Views
2K
How Do You Calculate Tension in a Rope Pulling a Box with Friction and an Angle?
  • · Replies 5 ·
Replies
5
Views
4K
Work Done on Pulley System: 840J
  • · Replies 7 ·
Replies
7
Views
2K
Calculate the coefficient of kinetic friction for a sliding box
  • · Replies 25 ·
Replies
25
Views
4K
What is the change in kinetic energy of the crate pulled up a rough incline?
  • · Replies 6 ·
Replies
6
Views
3K
How Much Power Is Required to Accelerate a Box with Friction Involved?
  • · Replies 3 ·
Replies
3
Views
2K