All categories

3 years ago

For the following situations, describe the contact and non-contact forces that are involved.

Physics

2 answers:

Sonja [21]3 years ago

8 0

I think is b not a 100% sure but maybe.

musickatia [10]3 years ago

7 0

Answer:

a. the book is exerting force down on the shelf (due to gravity) while the shelf is exerting force back up at the book.

b. when the soccer player kicks the ball, this is applied force. As the ball soars through the air and lands on the ground, the friction ends the movement of the ball.

c. the compass detects the Earth's natural magnetic feild. This force is non contact, since there is no physical touch between magnetic feilds and the compass.

d. when the child is just sitting on the hill on the sled, this is a contact force. The child is pushing down on the sled and the sled pushes back at the child. When he or she slides off down the hill, this contact force is put to a stop due to friction.

Explanation:

Explanation above for each situation.

You might be interested in

What is the motion of the particles in this kind of wave?

densk [106]

The particles will move up and down over small areas.

Option B.

<u>Explanation:</u>

The type of the wave that has been discussed in the question is the transverse kind of wave. The transverse kind of wave are the waves where the particle motion is the perpendicular to the motion of the wave.

In the transverse kind of wave the which is a moving kind of a wave where the oscillations are perpendicular to the direction of the movement of the wave.

8 0

3 years ago

In an experiment,the group that is exposed to the variable to be tested is called

bagirrra123 [75]

Answer:

The group that is exposed to the variable to be tested is called as experimental group.

Explanation:

An experiment consists of two kinds of group. They are experimental group and control group. The working of control group and experimental group are mostly same except that the variables will be changed in experimental group, while it is kept constant in control group. So at the end of experiments, the results from control group and experimental group are compared and the final outcome has been derived. So the given statement where the group is exposed to the variable to be tested or the independent variable is called as experimental group.

4 0

3 years ago

Use the Pythagorean Theorem to find the velocity of an airplane traveling north at 100 kilometers per hour. It is also flying th

nadezda [96]

Answer:

I'm not sure

Explanation:

HAVE FAITH IN UR SELF AND YOU WILL GETT ITTTT HOPEFULLAYY

3 0

3 years ago

Two men are trying to carry a wooden pole. If one of them is weaker than other, how can they carry the pole hence making small l

Romashka-Z-Leto [24]

Answer: Answer down below.

Explanation:

6 0

2 years ago

Read 2 more answers

A tennis player practices against a wall, hitting a 0.1 kg ball towards the

pantera1 [17]

Answer: 80 Newton

Explanation:

Initial velocity of ball = +20 m/s.

Final velocity of ball = -20 m/s

Mass of ball = 0.1kg

Time taken = 0.05 seconds

Average force = (Change in momentum of moving ball / Time taken)

Since, change in momentum = Mass (final velocity - initial velocity)

Change in momentum =0.1 x (-20 - (+20))

= 0.1 x (-20-20)

= 0.1 x (-40)

= -4.0 kgm/s

Then, put -4.0 kgm/s in the equation of force when Average Force = (Change in momentum / Time taken)

= (-4.0kgm/s / 0.05 seconds)

= 80Newton (note that the negative sign does not reflect on the magnitude of force)

Thus, the average force exerted on the ball is 80N

3 0

3 years ago