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
vladimir2022 [97]
3 years ago
10

a crowbar of 2 meter is used to lift an object of 800N if the effort arm is 160cm , calculste the effort applied

Physics
1 answer:
Vitek1552 [10]3 years ago
5 0

Answer:

200 N

Explanation:

The crowbar is 2 meter, or 200 cm.  The effort arm is 160 cm, so the moment arm of the object is 40 cm.

(800 N) (40 cm) = F (160 cm)

F = 200 N

You might be interested in
If a cart of 2 kg mass has a force of 8 newtons exerted on it, what is its acceleration?
Ilia_Sergeevich [38]
Force = mass * acceleration

F = ma

8 N =  2 kg * a

8 = 2a

2a = 8

a = 8/2 = 4

acceleration = 4 m/s²
7 0
3 years ago
Read 2 more answers
A ball is thrown against a wall and bounces back toward the thrower with the same speed as it had before hitting the wall. Does
lorasvet [3.4K]

Answer:

A) Although the speed is the same, the direction has changed. Therefore, the velocity has changed.

Explanation:

4 0
4 years ago
Objects falling through air experience a type Of friction called ____
DaniilM [7]

Answer: That's air resistance.

Explanation: Well, air resistance is an upward force exerted on falling objects.

( I hope this helped <3 )

6 0
4 years ago
Read 2 more answers
A 40-W lightbulb is 1.7 m from a screen. What is the intensity of light incident on the screen? Assume that a lightbulb emits ra
Sonja [21]

Answer:

Intensity, I=1.101\ W/m^2

Explanation:

Power of the light bulb, P  = 40 W

Distance from screen, r = 1.7 m

Let I is the intensity of light incident on the screen. The power acting per unit area is called the intensity of the light. Its formula is given by :

I=\dfrac{P}{A}

I=\dfrac{P}{4\pi r^2}

I=\dfrac{40\ W}{4\pi (1.7\ m)^2}

I=1.101\ W/m^2

So, the intensity of light is 1.101\ W/m^2.

6 0
4 years ago
What happens as a result of an increase in the intensity of a sound wave?
larisa [96]

As the intensity increases the energy increases.

Answer:

C. the energy of the sound wave increases

8 0
3 years ago
Read 2 more answers
Other questions:
  • Write newton's second law for an astronaut lying on the floor of one of the habitats
    5·2 answers
  • How would bias alter the results of the experiment
    12·2 answers
  • A 2 kg ball of putty moving to the right at 3m/s has a head-on inelastic collision with a 2 kg ball of putty at rest. What is th
    11·1 answer
  • State the principle of work-kinetic energy theorem.
    14·2 answers
  • Two charged metallic spheres of radii, R = 10 cms and R2 = 20 cms are touching each other. If the charge on each sphere is +100
    14·2 answers
  • If the hiker starts climbing at an elevation of 350 ft, what will their change in gravitational potential energy be, in joules,
    11·1 answer
  • Assume that the force of gravitational attraction between two objects is 6 units.
    9·1 answer
  • A person tries to lift each object with a force of 25 N, upward. Which
    13·2 answers
  • A wave with a frequency of 840 cycles per second has what period? Please help me !!
    7·1 answer
  • What is the frequency of a wave that has a wavelength of 3m that is traveling at a speed of 9m/s
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!