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
Salsk061 [2.6K]
3 years ago
9

A weightlifter raises a 50kg weight to a height of 2m in 2 minutes. What was the power spent by the weightlifter?

Physics
1 answer:
belka [17]3 years ago
8 0

Answer:

117.72kW

Explanation:

Given data

Mass m= 50kg

height x = 2m

time taken = 2 minutes= 129 seconds

let us find the work done

WD= force * distance

WD= mgx

WD= 50*9.81*2

WD= 981 Joules

Let us find the power

Power= work * time

Power= 981*120

Power= 117720

Power= 117.72 kW

Hence the power spent is 117.72kW

You might be interested in
Which statements correctly compare the gravitational force with the electrical force? Check all that apply.
skad [1K]

The statements that correctly compare the gravitational force with the electrical force are the following:

-The gravitational force can be attractive.

-The electrical force can be repulsive.

-The electrical force can be attractive.

-Any two objects experience a gravitational force between them.

9 0
3 years ago
Read 2 more answers
Explain why the driver's reaction time affects the thinking distance.
Lemur [1.5K]

Answer:

The thinking distance depends on the reaction time of the driver which could can affected by alcohol, distractions and tiredness. A faster speed increases both thinking  distance, increasing the total stopping distance.

<h2><em>I hope this is helpful. Would appreciate if you add me as brainliest.</em></h2>
7 0
4 years ago
UCaShoTLLOuuj9D4vqFtTpSQ<br><br> search
Bond [772]

Answer:

ok i searched it up in google and it showed links XDDDD

Explanation:

4 0
3 years ago
A forklift pushes a box with a force of 500 N across the floor for a distance of 5.0 m, then turns around and pushes with the sa
yanalaym [24]

Answer:

5,000J

Explanation:

Work = Force x Distance

Distance back and forth is canceled out, so either the answer is + or -

5.0m + 5.0m = 10.0m

500N x 10.0m = 5,000J

4 0
3 years ago
Which classification scheme is based on the brightness of a star as it appears to you in the night sky?
anastassius [24]
The apparent magnitude scale is a classification scheme which is based on the brightness of stars. The range of brightness values is from 1 to 6.
The stars which are the most brightest are ranked as number 1 and also called first magnitude stars, stars which are little dimmer than number 1 are ranked as number 2 and also called second magnitude stars. Similarly the most faintest stars are ranked number 6 and also called as the sixth magnitude stars.
3 0
3 years ago
Other questions:
  • Why would an atomic nucleus give off a particle?
    14·1 answer
  • Which of these is the best explanation for why two negatively charged balloons, if put close, will repel?
    9·1 answer
  • Suppose a plane accelerates from rest for 30 s, achieving a takeoff speed of 80 m/s after traveling a distance of 1200 m down th
    6·1 answer
  • A skater extends her arms horizontally, holding a 5-kg mass in each hand. She is rotating about a vertical axis with an angular
    10·2 answers
  • A person with his ear to the ground, sees a huge stone strikethe concrete pavement. A moment later two sounds are heard from the
    6·1 answer
  • Can a physical change, change what a substance is
    12·1 answer
  • Determine the current in the 7-ohm resistor for the circuit shown in the figure. Assume that the batteries are ideal and that al
    15·1 answer
  • Write down the condition required for the thermonuclear fusion.​
    15·2 answers
  • A car is moving along a straight line op is shown below it moves from O to P in 8sec and return to p to q in 6sec. What is the a
    15·1 answer
  • A + 8.42 nC point charge and a - 3.75 nC point charge are 2.73 cm apart. What is the electric field strength at the midpoint bet
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!