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lilavasa [31]
3 years ago
10

A 0.5 kg object is whirled on the end of a string that is 1.2 m long at a speed of 7.5 m/s. Calculate the angular momentum of th

e
object.
(Round your response to the nearest tenth, if necessary, and include the base unit abbreviation with your answer.)
Physics
1 answer:
WINSTONCH [101]3 years ago
3 0

Answer:

4.5kg m^2 s−1

Explanation:

Step one:

the expression for angular momentum is given as

L = mvr

m = mass  = 0.5kg

v = velocity  = 7.5m/s

r = radius= 1.2m

Required

L = angular momentum

Step two:

substitute into the expression

L=0.5*7.5*1.2

L=4.5kg m^2 s−1

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Answer:

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Now which direction is the static friction, assume that it is pointing inward so

Fc=Fs=mv²/r=1900*15²/55=427500/55=7772.72N

Since the car is not skidding we do not have kinetic friction so there can only be static friction. One reason we do not use μFn is because that is the formula for maximum static friction, and the problem does not state there is maximum static friction.

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From the top of the engineering building, you throw a ball vertically upward. the ball strikes the ground 4.00 s later. the engi
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5 0
3 years ago
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Talja [164]

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2. Displacement = 8.6 km

Explanation:

From the question given above, the following data were obtained:

Distance 1 (d₁) = 7 km

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Total distance =?

Displacement =?

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Distance 1 (d₁) = 7 km

Distance 2 (d₂) = 5 km

Total distance (dₜ) =?

dₜ = d₁ + d₂

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2. Determination of the displacement.

In the attached photo, R is the displacement.

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R = √74

R = 8.6 km

8 0
2 years ago
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