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
wlad13 [49]
3 years ago
8

A pear hangs in a tree at a height of 1.8 m. The pear has a mass of 0.2 kg. The pear falls out of the tree and lands on the grou

nd. (Use correct units in all answers.)
a. How much gravitational potential energy does the pear have before it falls?

b. How much kinetic energy does the pear have when it reaches the ground?

c. How fast is the pear moving when it hits the ground?
Physics
1 answer:
TiliK225 [7]3 years ago
6 0

a) PE=mgh=0.2*9.8*1.2=2.352 J

b) KE=PE=2.352 J

c) v=\sqrt{\frac{2KE}{m}}=4.85 m/s

You might be interested in
How do the forces on a skydiver affect the velocity of the skydiver as they fall?<br><br><br> Hellp
solmaris [256]

Answer:

Explanation:

As a skydiver falls, he accelerates downwards, gaining speed with each second. The increase in speed is accompanied by an increase in air resistance. This force of air resistance counters the force of gravity.

3 0
3 years ago
Read 2 more answers
Which of these scientists had the greatest contribution to early microscopy?
Alisiya [41]
B. I think is the correct answer
5 0
2 years ago
true or false/ force field that exists in the space around every massive body is called electric field​
musickatia [10]

Answer:

True

Explanation:

An electric field is a region around a charged particle or object within which a force would be exerted on other charged particles or objects.

3 0
3 years ago
If a ball is rolling in a straight line and you push it to the right its velocity will to the right
Keith_Richards [23]

The answer would be "velocity will stay in the same direction." Since the ball is going in the same the ball is still going straight but just right. Many people get confused over velocity and speed, speed it the average amount on how fast a object is going and velocity is the amount of force a object has when it has speed. So, in this case since how the ball is going straight but just right it would stay in the same direction.

Hope this helps!

4 0
3 years ago
A star is measured to be 18.9 light years from earth. what is the correct answer in the calculation shown below? (consider both
Lapatulllka [165]
A light year is a measurement of distance that is used in the space. It is the distance that a light traveled for 1 year on Earth or 365 days on Earth at a speed of 3 x 10^8 meters per second. To convert the units from light year to the SI unit meters, we simply make use of the definition of the unit. We do as follows:

18.9 light years ( 365 days / 1 light year ) ( 24 h / 1 day ) ( 3600 s / 1h ) ( 3 x 10^8 m/s) = 1.79 x 10^17 meters

Therefore, 18.9 light years is equal to 1.79 x 10^17 meters.
4 0
3 years ago
Read 2 more answers
Other questions:
  • It’s mid-afternoon on a lovely, sunny day; it’s 60°F, and the sun is 60° above the horizon. Rays from the sun strike the still s
    12·1 answer
  • Suppose a child drives a bumper car head on into the side rail, which exerts a force of 3400 N on the car for 0.400 s.(a) What i
    13·2 answers
  • A reaction in a solution would proceed slowest when -
    5·1 answer
  • Change to Kelvin 60 degree Celicius؟
    7·1 answer
  • A pinball bangs against a bumper giving the ball a speed of 42cm/s if the ball has a mass of 50.0g what is the ball’s kinetic en
    10·1 answer
  • PLEASE HELP ASAP I'LL GIVE BRAINLY!!
    14·1 answer
  • AYUDA!!!!
    6·1 answer
  • Where is a good place to check your pulse?
    7·2 answers
  • What is a question that an engineer might have about a can opener?
    15·1 answer
  • The formulas used to analyze the horizontal and vertical motion of projectiles launched at an angle involve the use of which fun
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!