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
Lubov Fominskaja [6]
3 years ago
10

a 2kg ball moving at speed 5m/s hits a wall .the force exerted by the wall on the ball is 100n .if the collision is perfectly el

astic , calculate the contact time between the ball and the wall​
Physics
1 answer:
levacccp [35]3 years ago
4 0

Answer:

0.2s

force = change in momentum/ time

time = change in momentum/time

Explanation:

first, let's find the change in momentum

pf-pi

5×(-2) - 5× 2

-20kgm/s = 20kgm/s(by changing the direction of whole system)

time = change in momentum/time

               20/100

                 <u> 0.2s</u>

You might be interested in
Which of the following gives an atom's mass number? Question 1 options: a.number of neutrons b.number of neutrons + number of pr
jeka57 [31]
The atom´s mass number is the "number of neutrons and number of protons (option B) in an atomic nucleus. It might determine the atomic mass os atoms. Because neutrons and protons are baryons, the mass number A is identical to mass number B as of the nucleus, atom or iron. 
3 0
3 years ago
Read 2 more answers
How can you change the size, shape, location of a shadow?
tigry1 [53]
Its all in how straight you stand
6 0
3 years ago
Read 2 more answers
Which of the following would cause an atom to have a positive electric charge? A. having more protons than electrons B. having m
Ostrovityanka [42]
In neutral state the atom got an equal number of protons (+) and electrons (-). If you lose and electron then you will have 1 more proton than electron, so you have a +, but if you gained an electron, then you'd have one more electron than protons, so you'd get a -. 
<span>Fx: carbon has 6 protons and 6 electrons. If carbon loses an electron, then the carbon atom would have 6 protons and only 5 electrons, then you'd have 6+ and 5-, which is 1 more plus and minuses, so you have C+. </span>
<span>If Carbon gained an electron, then you'd have 6+ and 7-, which is 1 more minus than pluses, so you'd have C-. </span>
<span>Last example, if you gained 2 electrons, then you'd have 6+ and 8-, which is 2 more minuses than pluses, which would give you an C-- (Also known as: C2-)</span>
5 0
3 years ago
Read 2 more answers
What part of the plant cell is responsible for making its food?
ArbitrLikvidat [17]
It is a part of the sugary liquid in the plant that uses photosynthesis to produce.
4 0
4 years ago
A student decides to spend spring break by driving 50 miles due east, then 50 miles 30 degrees south of east, then 50 miles 30 d
PolarNik [594]

Answer:

a. 600 ml, 12

Explanation:

The movement described in the question exhibits that of a polygon. Exhibiting a constant distance and angle with only varying direction until the starting point is reached.

The sum of exterior angles of a polygon = 360 degrees.

Exterior angle of a polygon = (360 ÷ number of sides)

Therefore,

Number of sides = 360 ÷ exterior angle

Exterior angle = 30 degrees

Hence,

Number of sides = 360 ÷ 30 = 12 sides

Since distance traveled of 50 miles is the same for each displacement ;

Total displacement = distance traveled * number of sides

Total displacement = 50 * 12 = 600 miles.

5 0
4 years ago
Other questions:
  • Charge A is sitting in an electric field you know the following information:________
    9·1 answer
  • Question 7 (1 point)
    15·1 answer
  • Please help. This is for my physics class, high school level!
    14·1 answer
  • A small fish is dropped by a pelican that is rising steadily at 0.500 m/s. How far below the pelican is the fish after 2.50 s?
    5·1 answer
  • A person stands on top of a tall building holding two rocks at a height of 50 meters. At the same moment, one rock is dropped fr
    15·1 answer
  • PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
    9·2 answers
  • (06.01 MC)
    9·2 answers
  • What would be a good reason to increase friction between surfaces? to allow objects to slide past each other easily to reduce we
    15·2 answers
  • What are fundamental quantities ​
    7·1 answer
  • How much water will flow in 30 secs through 200 mm of capillary tube of 1.50 mm in diameter, if the pressure difference across t
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!