1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
boyakko [2]
3 years ago
12

It took an American football lineman 14 seconds to complete 10 repetitions of a 102 kg bench press. If the bar had to travel 1.4

7 meters each repetition, what was the average power output during this set?
Physics
1 answer:
DIA [1.3K]3 years ago
3 0

Answer:

1050.651 W

Explanation:

m = Mass of bench press = 102 kg

h = Height of lift = 1.47 m

t = Time taken = 14 seconds

g = Acceleration due to gravity = 9.81 m/s²

The work done is

W=mgh\\\Rightarrow W=102\times 9.81\times 1.47\\\Rightarrow W=1470.9114\ J

For 10 times

W=10\times 1470.9114\\\Rightarrow W=14709.114\ J

Power is given by

P=\dfrac{W}{t}\\\Rightarrow P=\dfrac{14709.114}{14}\\\Rightarrow P=1050.651\ W

The power is 1050.651 W

You might be interested in
What is true about resistance? Check all that apply. A. It is the excess accumulation of electric charge B. It is measured in oh
Alekssandra [29.7K]

Answer:

B, C and E

Explanation:

The unit of resistance in the international system is the Ohm, the equation that describes the resistance is:

R=p\frac{l}{S} \\

Where (l) is for lenght of the wire, (S) is the area and (p) its the constant associated to the conductor.

It's related by the Ohm's Law:

R=\frac{V}{I}

3 0
3 years ago
What are possible formulas for impulse? Check all that apply. J = Fdeltat J = StartFraction force over change in time EndFractio
Alex

<u>The possible formulas for impulse are as follows:</u>

J = FΔt

J = mΔv

J = Δp

Answer: Option  A, E and F

<u>Explanation:</u>

The quantity which explains the consequences of a overall force acting on an object (moving force) is known as impulse. It is symbolised as J. When the average overall force acting on an object than such products are formed and in given duration than the start fraction force over change in time end fraction J = FΔt.

The impulse-momentum theorem explains that the variation in momentum of an object is same as the impulse applied to it: J = Δp J = mΔv if mass is constant J = m dv + v dm if mass changes. Logically, the impulse-momentum theorem is equivalent to Newton second laws of motion which is also called as force law.

6 0
3 years ago
How can you increase the momentum of an object
Olin [163]

Answer:

You can change the momentum of an object by giving the object more force or less force.

Explanation:

Think about a ball. It is going slow, you push it and you give it more momentum.

5 0
3 years ago
1.How long dose long term alcohol abuse affect the liver ?
Agata [3.3K]
1. B- it can cause cirrhosis
2. C- intoxication
3. A- admit to having a problem with alcohol
4. D- binge-drinking
5. A- depressant
6. true
7. false
7 0
3 years ago
Read 2 more answers
How can pressure impact the alignment of minerals within the rock
Sloan [31]
Metamorphism occurs because some minerals are stable only under certain conditions of pressure and temperature. When pressure and temperature change, chemical reactions occur to cause the minerals in the rock to change to an assemblage that is stable at the new pressure and temperature conditions.
6 0
3 years ago
Other questions:
  • True or false a mixture of soil has the same chemical composition throughout ?
    11·2 answers
  • Calculate the power of the eye in D when viewing an object 5.70 m away. (Assume the lens-to-retina distance is 2.00 cm. Enter yo
    6·1 answer
  • White Blood Cells can be part of which body systems? (Choose all that<br> apply)
    9·1 answer
  • What is sin for the given right triangle?
    12·2 answers
  • A women weighs 857 N. What is her mass?
    13·2 answers
  • Energy is<br> A) conserved<br> OB) created only<br> OC) destroyed only<br> OD) created or destroyed
    15·2 answers
  • Multiple choice: Sunspots appear dark because
    8·1 answer
  • The question will be on one of the comments on the answers you give just now take the points
    8·1 answer
  • Why does lowering the temperature of an object increase its density
    7·1 answer
  • PLEASE ASAP HELP, ILL GIVE WHATEVER POINTS I CAN BUT PLEASE HELP ASAP ASAP
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!