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
olga nikolaevna [1]
3 years ago
14

a 2.80 kg mass is dropped from a height of 4.50 m. find its potential energy(PE) at the moment it is dropped. PLEASE HELP

Physics
1 answer:
Maurinko [17]3 years ago
4 0

Answer:

126 J

Explanation:

The potential energy only depends on the vertical height from the ground level.

We consider the ground level to have zero P.E.

We get, when it is 4.5 m above the ground level,

P.E. =  mgh

      = 2.8×10×4.5

      = 126 J

You might be interested in
What is the amount of matter in a substance?​
professor190 [17]

Answer:

mass

Explanation:

Mass (M) is the measure of the amount of matter in an object. Mass is measured in grams (g). Mass is measured on a balance by comparing the object against other objects with known masses.

6 0
2 years ago
Read 2 more answers
For an object on a flat surface, the force of gravity is 10 newtons downward and the normal force is 10 newtons upward. The appl
bezimeni [28]
3 Newtons toward the right because Newton’s second law:
F = ma
15N - 12N = ma
3N = ma
(With the right being the positive direction and the left the negative direction)
3 0
2 years ago
How many joules of heat must be transferred to a 410-g aluminum pizza pan to raise its temperature from 32oC to 232oC? The speci
xxTIMURxx [149]

Answer:

recall that heat absorbed released is given by

Q = mc*(T2 - T1)

where

m = mass (in g)

c = specific heat capacity (in J/g-k)

T = temperature (in C or K)

*note: Q is (+) when heat is absorbed and (-) when heat is released.

substituting,

Q = (480)*(0.97)*(234 - 22)

Q = 98707 J = 98.7 kJ

Explanation:

3 0
3 years ago
The ability of your joints and muscles to move in their full range of motion is called
Studentka2010 [4]

Answer:

Dynamic flexibility

Explanation:

Dynamic flexibility can be generally defined as the ability of the body muscles and joints to move in full range of motion. High flexibility in these joints and muscles leads to the decreasing pain and injury in different parts of the body.

Proper warm up exercises are needed to be carried out that involves both the combination of controlling movements and stretching of the body, and this directly enhances the dynamic flexibility of the body.

The athletes and sports persons possesses a good dynamic flexibility of their body as they carry our different types of body exercises.

6 0
3 years ago
When a car stops, the brakes heat up because of friction. What is this an example of?
Umnica [9.8K]
Kinetic Energy would have to be the answer. Pretty sure.
6 0
3 years ago
Other questions:
  • 9. An astronaut of mass 90 kg walks in space outside her spaceship and receives a 30-N force from a nitrogen spurt gun. What acc
    15·2 answers
  • Ajdaifsgodtistizhxtsgoachoach
    13·1 answer
  • An object starts at Xi = -4m with an initial velocity of 4m/s. It experiences an acceleration of -2 m/s^2 for 2 seconds, followe
    11·1 answer
  • Which statement best describes longitudinal waves?
    13·2 answers
  • After t = 0.38 s what is the speed of the block?
    15·1 answer
  • A Porter carries a 25 kg suitcase a distance of 1 km. Explain why the Porter does no work
    14·1 answer
  • Say you have a differential drive robot that has an axle length of 30cm and wheel diameter of 10cm. Find the angular velocity fo
    11·1 answer
  • A well-known transform boundary found in California is the _____. San Francisco fault, San Andreas fault, San Diego fault, OR Sa
    12·2 answers
  • 10POiNTS!!! SPACE QUESTION!
    8·1 answer
  • Which measurement would be different if you were on the Moon versus on Earth? a mass b. weight​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!