Energy, work, power unit 3 question

In summary, the conversation is about finding the angle to the horizontal that a man must pull a box with a mass of 15 kg, assuming the force of friction can be ignored and the box has an acceleration of 1.27 m/s. The relevant equations are Fnet=ma and Fnet=Fcos[theta]. The solution involves using components of force and acceleration in the horizontal direction.
  • #1
Dcpc10
1
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
  • #2
Welcome to PF!

Hi Dcpc10! Welcome to PF! :wink:

Use components of force and acceleration in the horizontal direction …

what do you get? :smile:​
 

FAQ: Energy, work, power unit 3 question

1. What is the difference between energy, work, and power?

Energy is the capacity to do work, while work is the transfer of energy from one form to another. Power, on the other hand, is the rate at which work is done or energy is transferred.

2. What is the SI unit for measuring energy?

The SI unit for measuring energy is joule (J). Other commonly used units include calorie (cal) and kilowatt-hour (kWh).

3. How is energy converted from one form to another?

Energy can be converted from one form to another through various processes such as mechanical work, thermal processes, chemical reactions, and nuclear reactions.

4. How is power related to energy and time?

Power is the rate at which energy is transferred or work is done. It is directly proportional to energy and inversely proportional to time. This means that the more energy is transferred or work is done in a given amount of time, the higher the power.

5. What are some examples of renewable and non-renewable sources of energy?

Renewable sources of energy include solar, wind, hydro, geothermal, and biomass, which can be replenished naturally. Non-renewable sources of energy include fossil fuels such as coal, oil, and natural gas, which are finite and cannot be replenished at the same rate as they are consumed.

Similar threads

Work and energy of an object on a ice slope
Replies
7
Views
1K
Work of gravity on an object sliding down a frictionless sphere
Replies
12
Views
2K
Calculate the work done moving a crate
Replies
3
Views
2K
Avg Power in a Rotational Energy/Work Problem
Replies
6
Views
723
How much work done by friction when a box w/apparent mass...?
Replies
4
Views
2K
How Do You Calculate Tension in a Rope Pulling a Box with Friction and an Angle?
Replies
5
Views
4K
Work Done on Pulley System: 840J
Replies
7
Views
2K
Calculate the coefficient of kinetic friction for a sliding box
Replies
25
Views
3K
What is the change in kinetic energy of the crate pulled up a rough incline?
Replies
6
Views
2K
How Much Power Is Required to Accelerate a Box with Friction Involved?
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top