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fredd [130]
3 years ago
14

A wood block is sliding up a wood ramp. if the ramp is very steep, the block will reverse direction at its highest point and sli

de back down. if the ramp is shallow, the block will stop when it reaches its highest point.
Physics
1 answer:
DanielleElmas [232]3 years ago
5 0
<span>Answer: So it gets to the top of the ramp and stops. The parallel force pushing it down the ramp is mg sin θ, but for it to move, the frictional force must be overcome. This frictional force is μmg cos θ, where μ is the coefficient of static friction. For movement, then, mg sin θ > μmg cos θ ==> tan θ > μ ==> θ > arctan 0.5 = 26.565° ==> θ = 27°</span>
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If Steve throws the football 50 meters in 3 seconds, what is the average speed of the football? Speed = distance / time Question
leva [86]

Answer:

A. 16.67 m/s

Explanation:

Speed or velocity refers to the rate of change in distance over a change in time. That is;

Speed = Distance ÷ time

Where;

Speed is in metre/seconds

Distance is in metre

Time is in seconds.

In this question, Steve throws a football 50 meters in 3 seconds. The average speed can be calculated this:

S = D/t

Where; d = 50m, t = 3s

S = 50/3

S = 16.6666666

S = 16.67m/s

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2 years ago
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Lyrx [107]

Answer:

ion know tbh

Explanation:

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2 years ago
Why does a lorry travelling at 30mph have more kinetic energy than a car travelling at the same velocity?
rjkz [21]

Answer:

Because it has more mass

Explanation:

To understand this, think about the equation of kinetic energy

KE = \frac{1}{2} m v^{2}

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Because a lorry is bigger and heavier than a car, it will have more mass. With more mass, at the same velocity the lorry with have more kinetic energy.

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3 years ago
The peak intensity of a radiation from star beta is 350nm in what spectral bands is this
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5 0
2 years ago
An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? (Formula: )
Furkat [3]
KE = 1/2 * m * v2

We have to rearrange this so the subject is mass. (because the question asks for the mass of the object) :

Mass = (2 * KE) / v

Now input the values into this equation to get your answer :

Mass = (2 * KE) / v
Mass = (2 * 480) / 8
Mass = 960 / 8
Mass = 120
7 0
2 years ago
Read 2 more answers
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