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gtnhenbr [62]
3 years ago
7

Throw a paper ball towards a hard wall.

Physics
1 answer:
Len [333]3 years ago
7 0
The answer is d hope this helps
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When a 100-N force acts horizontally on an 8.0-kg chair, the chair moves at a constant speed across the level floor. Which state
TiliK225 [7]

Answer:

The applied force is greater than the frictional force.

Explanation:

the chair moves at <u>a constant speed</u><u> </u><u>therefore</u><u>,</u><u> </u><u>the</u><u> </u><u>answer</u><u> </u><u>is</u><u> </u><u>not</u><u> </u><u>A</u><u> </u><u>or</u><u> </u><u>C</u><u>.</u>

if there is no friction then the chair <u>would accelerate and it would not be at a constant speed</u><u>.</u>

hence, the only possible answer is B.

7 0
3 years ago
A girl takes her dog for a walk on a sunny beach. Find the force of gravity between the 45-kg girl and her 11-kg dog when they a
Lady_Fox [76]

The gravitational force acting between them is 8.25*10^-^9N

Data given;

  • M1 = 45kg
  • M2 = 11kg
  • r = 2.0m
  • G = 6.67*10^-^1^1m^3kg^-^1s^-^1

To solve this question, we need to apply gravitational force or energy formula.

<h3>Gravitational Force</h3>

This states that the force of attraction between two bodies is equal to the product of their bodies and inversely proportional to the square of their distance apart.

Mathematically;

F = \frac{GM_1M_2}{r^2} \\

let's substitute the values and solve

F = \frac{Gm_1m_2}{r^2}\\F = \frac{6.67*10^-^1^1 * 45 * 11}{2^2}\\F = 8.25*10^-^9N

The force of gravity acting between them is 8.25*10^-^9N

Learn more on gravitational force here;

brainly.com/question/11359658

4 0
3 years ago
. A car starts to move from rest. If its velocity becomes 90km/hr after 3s, calculate its acceleration​
Likurg_2 [28]

Answer:

32.5/s squared

Explanation:

6 0
3 years ago
What is the velocity (in m/s) of a 550 kg roller coaster cart at the bottom of the track if it started with 990,000 J of gravita
sesenic [268]

Answer:

60m/s

Explanation:

initial energy = final energy

g.p.e = k.e

k.e = 0.5 × mass × velocity²

g.p.e = 990000J as per Question

990000Nm = 0.5 × 550 × V²

V² = 3600

V = 60m/s

4 0
3 years ago
Kinetic energy is energy that is stored and not moving<br> O True<br> O False
trasher [3.6K]
The answer to this is that it is FALSE!
4 0
2 years ago
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