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Over [174]
3 years ago
10

if a car is taken from the garage driven for 100km before returning to the garage after 2 hours what is it average speed?

Physics
1 answer:
brilliants [131]3 years ago
8 0

Answer:

50km/h

Explanation:

Average Speed = Distance/Time

100km/2h = 50km/h

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Explanation:

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Why does a compass work differently on a moon then it would on earth
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Since the direction of the needle depends on the proximity of the magnet thus this test alone is insufficient to determine the stronger magnet.

<h3>What is a magnetic field?</h3>

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6 0
2 years ago
A 0.50 kilogram ball is held at a height of 20 meters. What is the kinetic energy of the ball when it reaches halfway after bein
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Answer:

A. 49 joules

Step By Step Solution:

Via kinematic equations we can must first determine the velocity of this object after 10 meters (since halfway of 20 meters is 10).

v_{final}^2=v_{initial}^2+2gd

Where the initial velocity is zero since it's held at a height of 20 meters, hence it's not moving initially, g is the average gravity on Earth 9.8 m/s^2 and d is the distance this object will travel so 10 meters. By plugging these values in we obtain:

v_{final}^2=0+2(9.8)(10)\\\\v_{final}=\sqrt{2(9.8)(10)}=14m/s

And the equation for kinetic energy is :

K.E.=\frac{1}{2}mv^2=\frac{1}{2}(0.5kg)(14m/s)^2=49J

So the kinetic energy halfway after being released is 49 joules.

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3 years ago
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