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Marizza181 [45]
4 years ago
6

Name the net force between objects that allows a car to travel in a circle

Physics
1 answer:
iren [92.7K]4 years ago
6 0
I think centripetal force ☺
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A car of mass 800 kg is travelling at 30 m/S. The car then brakes suddenly and stops with a braking distance of 75 m find the wo
gulaghasi [49]

Answer:

-360 kJ

Explanation:

Given:

m = 800 kg

v₀ = 30 m/s

v = 0 m/s

Δx = 75 m

Find: W

We can solve this using either forces or energy.

To use forces, first find the acceleration.

v² = v₀² + 2aΔx

(0 m/s)² = (30 m/s)² + 2a (75 m)

a = -6 m/s²

Then apply Newton's second law:

∑F = ma

F = (800 kg) (-6 m/s²)

F = -4800 N

Work is force times distance:

W = FΔx

W = (-4800 N) (75 m)

W = -360,000 J

W = -360 kJ

If you want to use energy instead:

work = change in energy

W = ΔKE

W = ½mv² − ½mv₀²

W = ½ (800 kg) (0 m/s)² − ½ (800 kg) (30 m/s)²

W = -360,000 J

W = -360 kJ

4 0
3 years ago
If a simple truss member is known to carry a tensile force, then the internal force drawn on a free-body at a section cut when u
mote1985 [20]

Answer: b) pointed toward and parallel to the member.

Explanation:

It is shown in the picture attached

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3 years ago
What was Robert Boyle's most famous discovery about gases​?
stellarik [79]

Answer:

The inverse(opposite) relationship between absolute pressure and the volume of a gas. This is known as Boyle's law.

Explanation:

The temperature must be kept the same in a closed system.

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3 years ago
1. Compared to sadness, depression:
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The answer should be B - lasts longer.
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If you were on the open ocean on a large ship, what steps would you do to determine the height of a wave?
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