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
blagie [28]
3 years ago
11

A bodybuilder loads a bar with 550 Newtons (~125 pounds) of weight and pushes the bar over her head 10 times. Each time she lift

s the weight 0.5 meters. How much work did she do?
Physics
2 answers:
tangare [24]3 years ago
5 0
<span>  (550 N) X (0.5 m) = 275 joules</span>
mafiozo [28]3 years ago
3 0

Work = (force) x (distance)

Each time she lifts the weight, she does

          (550 N) x (0.5 m) = 275 joules of work against gravity.

Each time she lets the bar down gently, gravity does

          (550 N) x (0.5 m) = 275 joules of work against her muscles. 

If the human physical muscular system were 100% efficient, and capable
of absorbing work as well as spending it, then the bodybuilder would do
exactly zero work in the process of 1-up followed by 1-down.


You might be interested in
What is the definition of motivation?
elixir [45]
Motivation is an encouragement to do or achieve something
5 0
3 years ago
A football kicker kicks a ball with a mass of .42 kg. The average acceleration of the football was 14.8 m/s squared. How much fo
mrs_skeptik [129]

To find the force we use the formula,

F = ma , where m is mass and a acceleration

Using the formula,

F = ma

F = 0.42 x 14.8

F = 6.216 N / 6.22 N

Hope you liked the answer !

4 0
3 years ago
Explain and derive the equation for capillary action in the phenomenon of surface tension​
lapo4ka [179]

Answer:

Explanation:Capillary action is the ability of a liquid to flow in narrow spaces without the assistance of, ... This article is about the physical phenomenon. ... If the diameter of the tube is sufficiently small, then the combination of surface tension (which is caused by cohesion ... They derived the Young–Laplace equation of capillary action.

3 0
3 years ago
11)A 1100 kg car travels on a straight highway with a speed of 30 m/s. The driver sees a red light ahead and applies her
cestrela7 [59]

Answer:

Time taken = 8.25 second

Explanation:

Given:

Force = 4000 N

Force = ma

4,000 = (1100)(a)

Acceleration = 3.6363 m/s²

v = u + at

0 = 30 + (3.6363)t

Time taken = 8.25 second

3 0
3 years ago
Give examples for the following (You may do as many as you want):
valina [46]

Answer:

Explanation:6

6 0
2 years ago
Other questions:
  • 1. What do you notice or wonder about ultrasound imaging? (black and white pictures)
    10·1 answer
  • What time does the full moon rise? A. About Sunrise B. About Noon C. About Sunset D. About Midnight
    9·2 answers
  • Your friend wants your advice about his new transformation fitness plan. He has found a plan that sounds promising to him, but h
    11·1 answer
  • Harry and ron set up this experiment with a glider, whose mass they have measured to be 565 g, and seven washers hanging from th
    10·1 answer
  • HELP PLEASE!<br> write the equation for calculating relative velocity in one dimensional.
    15·1 answer
  • A neutral atom contains 8 protons 9 neutrons, and 8 electrons the atom must be A. A oxygen isotope. B. A nitrogen isotope. C. A
    14·2 answers
  • A small remote-control car with a mass of 1.65 kg moves at a constant speed of v = 12.0 m/s in a vertical circle inside a hollow
    13·1 answer
  • Can someone please help me on thisss
    13·1 answer
  • ¿Qué distancia recorrió un avión que viajaba a 750 km/h después de 2 h y media de vuelo?
    7·1 answer
  • 450 nm of light falls on a single slit of width 0.30 mm. What is the angular width of the central diffraction peak
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!