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serg [7]
3 years ago
6

A cannonball and a marble roll smoothly from rest down an incline. Is the cannonball’s(a) time to the bottom and(b) translationa

l kinetic energy at the bottom more than, less than, or the same as the marble’s?
Physics
1 answer:
Salsk061 [2.6K]3 years ago
5 0

Answer:

Explained

Explanation:

a) Cannonball and marble will reach the bottom at the same time, as acceleration due to gravity is independent of the mass of the body.

b)Translational Kinetic energy of the cannonball will be more than that of the marble as the cannonball has more mass than the marble.

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Answer:

speed = 63.5 km/hr

Explanation:

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3 years ago
What is the magnitude of the free-fall acceleration at a point that is a distance 2R above the surface of the Earth, where R is
ss7ja [257]

Answer:

g' = g/9 = 1.09 m/s²

Explanation:

The magnitude of free fall acceleration at the surface of earth is given by the following formula:

g = GM/R²   ----- equation 1

where,

g = free fall acceleration

G = Universal Gravitational Constant

M = Mass of Earth

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So, in our case,

R = R + 2 R = 3 R

Therefore,

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3 0
3 years ago
Now imagine a person dragging a 50 kg box along the ground with a rope, as
ANTONII [103]

Answer:

The coefficient of static friction between the box and floor is, μ = 0.061

Explanation:

Given data,

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The force exerted by the person, F = 50 N

The time period of motion, t = 10 s

The frictional force acting on the box, f = 30 N

The normal force on the box, η = mg

                                                     = 50 x 9.8

                                                     = 490 N

The coefficient of friction,

                            μ = f/ η

                               = 30 / 490

                               = 0.061

Hence, the coefficient of static friction between the box and floor is, μ = 0.061

7 0
4 years ago
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klasskru [66]

Answer:

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3 0
3 years ago
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Alla [95]
We cannot consider something to be work unless <span>force applied causes movement of an object in the same direction as the applied force. </span>
4 0
4 years ago
Read 2 more answers
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