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r-ruslan [8.4K]
4 years ago
7

A bicyclist exerts an input force of 15 N on a bicycle with a mechanical advantage of 12. What is the output force of the bicycl

e?
Physics
2 answers:
olga55 [171]4 years ago
6 0

Answer: 180 N

Explanation: Mechanical advantage of a machine is the ratio of the output force to the input force in a machine.

{\text {mechanical advantage}}=\frac{\text {output force}}{\text {input force}}

Given: mechanical advantage = 12

input force = 15 N

12}=\frac{\text {output force}}{15N}

12}=\frac{\text{output force}}{15N}

{\text{output force}}=180N

Pachacha [2.7K]4 years ago
5 0
The answer is 180, because 15x12=180 <span />
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P=96761.28Pa

Explanation:

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3 years ago
A student pushes on a crate with a force of 100 Newtons directed to the right.
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Answer:

100N

Explanation:

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3 years ago
Which of the following statements are true at some time during the course of the motion? Check all that apply. Check all that ap
eduard

Answer:

The object can have zero velocity and, simultaneously, nonzero acceleration.

The object can have zero acceleration and, simultaneously, nonzero velocity.

The object can have nonzero velocity and nonzero acceleration simultaneously.

Explanation:

An object in simple harmonic motion has a total mechanical energy (sum of elastic potential energy and kinetic energy) that is constant:

E=U+K=1/2kx^2 + 1/2}mv^2

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v is the speed

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In Newton's law F = ma, this can be also be written as

ma=-kx

a=-k/mx

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From the first equation, we can now states that:

When the displacement is zero, x=0, the acceleration is zero, a=0, and the velocity is maximum

When the velocity is zero, v=0, the acceleration is maximum, which occurs when the displacement is maximum

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So the correct answers are

The object can have zero acceleration and, simultaneously, nonzero velocity.

The object can have nonzero velocity and nonzero acceleration simultaneously.

The object can have zero velocity and, simultaneously, nonzero acceleration.

4 0
4 years ago
Read 2 more answers
If a train travels at a speed of 40 km/h for 3 hours, how far will it travel
VikaD [51]
120 km/3 hours. 40/1=?/3 1x3=3 hours so 40x3=120 km
8 0
3 years ago
Read 2 more answers
On a hot summer day, you and your friends decide to have a picnic at the park. To keep your food fresh you pack your lunch in a
g100num [7]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The <u>Fruit juice </u> should be put in the cooler, because <u>it has the greatest heat capacity</u> and will therefore, <u>absorb the most heat for each degree it increases in temperature.</u>

Explanation:

in order to understand the answer above we need to know what specific heat capacity is

       Specific heat capacity  can be defined as the amount of heat required to raise the temperature of a unit mass of a substance by one degree  

     Looking at the specific heat of each substance suggested we see that the fruit juice has a higher specific heat capacity than others this is because it contains a higher amount of water , generally liquid states of substances have a higher specific heat capacity than other states. The specific heat capacity of fruit juice being the highest among the suggested substances means that it can absorb  more heat for each degree temperature of refrigerator.

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