Work and Power- homework question

In summary, work and power are two important concepts in physics that involve the transfer or conversion of energy over a given amount of time. Work is the product of force and distance, while power is the rate at which work is done. They are related by the equation Power = Work/Time, and examples in daily life include lifting objects, climbing stairs, and riding a bicycle. To calculate work and power, formulas such as Work = Force x Distance and Power = Work/Time are used, requiring knowledge of the force, distance, and time involved. The SI units for work and power are joules (J) and watts (W), but other units such as calories or horsepower may also be used.
  • #1
Eric1
5
0
I'm doing intro-physics and I'm stuck on this Q:

"In a human cannonball act in the circus, the barrel of a cannon is 3.05 meters long and 1070 J of work are used to accelerate the person. What is the force exerted on the person (in Newtons)?"

I know the formula for force is F=ma, but i feel like I'm missing something here.
Can anyone help me?
 
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  • #2
[tex]P = \frac{w}{t} = \frac{f*d}{t}[/tex]

Does that help?
 
  • #3
Thank you Fred.
 

FAQ: Work and Power- homework question

1. What is work and power?

Work and power are two important concepts in physics that are related to the amount of energy transferred or converted in a given amount of time. Work is defined as the product of force and distance, while power is the rate at which work is done.

2. How are work and power related?

Work and power are related by the equation: Power = Work/Time. This means that the amount of power required to do a certain amount of work in a given time is directly proportional to the amount of work done.

3. What are some real-life examples of work and power?

Some examples of work and power in daily life include lifting a heavy object, climbing stairs, and riding a bicycle. In each of these situations, work is being done and power is being used to complete the task.

4. How do you calculate work and power?

To calculate work, you can use the formula: Work = Force x Distance. Power can be calculated by using the formula: Power = Work/Time. Both of these calculations require knowledge of the amount of force, distance, and time involved.

5. What are the units of work and power?

The SI unit for work is joule (J), while power is measured in watts (W). In some cases, other units such as calories or horsepower may also be used to measure work and power.

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