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Ne4ueva [31]
3 years ago
7

You've probably seen how the surface of a tire can partially melt and leave a mark on the road when a car's brakes are applied r

eally hard. Explain why the surface of the tire melts.
Physics
1 answer:
yan [13]3 years ago
7 0

Answer:

tire marks are due to the increase in thermal energy

Explanation:

When a tire is spinning at a given speed when the brakes are applied hard, the friction between the tire's particulate and the ground surface is high enough that some tire particles are transferred to the ground.

This is reflected in the heat transfer from the tire to the ground.

Consequently, tire marks are due to the increase in thermal energy and the change in the friction force of the tire.

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A box of books is in the floor. The following picture shows a push and a pull acting in the box.
nataly862011 [7]
Net force = 50 + 50 = 100 M
Since two forces act towards the same direction , total force should be their sum amd towards the same direction as the two forces
8 0
3 years ago
Need some help plsss!
RoseWind [281]

Answer:

1and4attract and1and 2repel

6 0
3 years ago
A cannonball has just been shot out of a cannon aimed 45∘ above the horizontal rightward direction. Drag forces cannot be neglec
Novosadov [1.4K]

Answer:

The free-body diagram of the cannonball is found in the attachment below

<em>Note The question is incomplete. The complete question is as follows:</em>

<em>A cannonball has just been shot out of a cannon aimed 45∘ above the horizontal rightward direction. Drag forces cannot be neglected.</em>

<em>Draw the free-body diagram of the cannonball.</em>

Explanation:

Free-body diagrams are diagrams used to show the relative magnitude and direction of all forces acting upon an object in a given situation.

In order to construct free-body diagrams, it is important to know the various types of forces acting on the object in that situation. Then, the direction in which each of the forces is acting is determined. Finally the given object is drawn using any given representation, usually a box, and the direction of action of the forces are represented using arrows.

In the given situation of a cannonball which has just been shot out of a cannon aimed 45∘ above the horizontal rightward direction., the forces acting on it are:

F = force exerted by the cannon acting in the direction of angle of projection

Fdrag = drag force. The drag force acts in a direction opposite to the force exerted by the cannon

Fw = weight of the cannonball acting in a downward direction

The free body diagram is as shown in the attachment below.

6 0
3 years ago
A 4 kg bowling ball moving at 1.4 m/s east impacts a 400 g pin that is stationary. After the impact, the ball is moving at 0.5 m
nignag [31]

The speed of the pin after the elastic collision is 9 m/s east.

<h3>Final speed of the pin</h3>

The final speed of the pin is calculated by applying the principle of conservation of linear momentum as follows;

m1u1 + mu2 = m1v1 + m2v2

where;

  • m is the mass of the objects
  • u is the initial speed of the objects
  • v is the final speed of the objects

4(1.4) + 0.4(0) = 4(0.5) + 0.4v2

5.6 = 2 + 0.4v2

5.6 - 2 = 0.4v2

3.6 = 0.4v2

v2 = 3.6/0.4

v2 = 9 m/s

Thus, The speed of the pin after the elastic collision is 9 m/s east.

Learn more about linear momentum here: brainly.com/question/7538238

#SPJ1

3 0
2 years ago
Write an essay about Paralympic and Special Olympic Essay 100 points
wlad13 [49]

Answer:

The Paralympics does the same. The Special Olympics and the Paralympics are both sports organizations for disabled athletes, but they are very different organizations and are not connected. Many people confuse the Paralympics and the Special Olympics.

Explanation:

8 0
3 years ago
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