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AfilCa [17]
3 years ago
14

A tennis ball is thrown against a vertical concrete wall that is fixed to the ground. The ball bounces off the wall. How does th

e force exerted by the ball on the wall compare with the force exerted by the wall on the ball
Physics
1 answer:
cestrela7 [59]3 years ago
8 0

Answer:

Explanation:

The forces compare together as a result of the fact that the force exerted by that of the ball and the force exerted by that of the wall both have the same magnitude.

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A sled is dragged along a horizontal path at a constant speed of 1.50 m/s by a rope that is inclined at an angle of 30.0° with r
Allisa [31]

Answer:2987.7 J

Explanation:

Given

sled weight is W=470 N

Tension in rope T=230 N

Time interval t=10 s

velocity of sled v=1.5 m/s

here speed is equal to velocity which is constant therefore acceleration is zero

thus F_{net}=0

Distance traveled in t=10 s

x=v\times t=1.5\times 10=15 m

considering surface to be friction less

thus T\cos 30 will do work on sled

W=F\cdot x

W=T\cos 30\cdot x

W=230\cos 30\times 15

W=2987.78 J\approx 2.987 kJ

4 0
3 years ago
You walk 10 miles north, 20 miles south, and 5 miles north. Taking north to be the positive y direction, define a position vecto
gulaghasi [49]

Considering north as positive Y axis

       First  10 miles north means a positive 10 displacement along y direction

      Second 20 miles south means a negative 20 displacement along y direction

       Third 5 miles south means a positive 5 displacement along y direction

So total displacement = 10 - 20 + 5 = -5 miles displacement

So position vector of the final position = - 5 j

3 0
3 years ago
HELPPPPPURGENT PLEASE NB 35
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3 years ago
To maintain the same amount of torque due to a mass on a balance as the mass is increased, how should the position of the mass c
olasank [31]

Answer:

the mass should be bring closer to the point about which we are finding torque

Explanation:

τ = Σr × F = rmg

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Torque is directly proportional to -

1.mass, m , of object

2. distance, r, of the mass from the point about which we are finding the torque.

So if we increase or decrease them then the torque will also increase or decrease.

So if we increase the mass the torque will increase but since we have to maintain same torque therefore we have to decrease the distance of mass from the point about which we are finding torque.

Therefore the mass should be bring closer to the point about which we are finding torque.

8 0
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Which of the following is a function of the atmosphere?
almond37 [142]
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3 0
3 years ago
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