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Art [367]
3 years ago
15

A bicyclist of mass 90 kg drives around a circle with a centripetal acceleration

Physics
2 answers:
Serggg [28]3 years ago
5 0

given,

mass of bicyclist(m)=90Kg

centripetal acceleration(a)=1.5 m/s2

centripetal force(F)=ma= 90×1.5=145 N

Sati [7]3 years ago
5 0

Answer:

Force, F = 135 N

Explanation:

Given that,

Mass of the bicyclist, m = 90 kg

Centripetal acceleration of the bicyclist, a=1.5\ m/s^2

To find,

The centripetal force acting on the bicyclist.

Solution,

When an object moves in a circular track, it will under the action of centripetal acceleration and the exerted force is called centripetal force. It can be calculated as :

F=ma

F=90\ kg\times 1.5\ m/s^2

F = 135 N

So, the centripetal force acting on the bicyclist is 135 N.

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3 years ago
The model shows sunlight reaching Earth. Four points are shown on different parts of earth.
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2 years ago
A 1.2 g pebble is stuck in a tread of a 0.76 m diameter automobile tire, held in place by static friction that can be at most 3.
Maksim231197 [3]

Answer:

v=33.764m/s

Explanation:

Given data

Mass m=1.2 g=0.0012 kg

diameter d=0.76 m

Friction Force F=3.6 N

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Velocity v

Solution

From the Centripetal force we know that

F_{c}=\frac{mv^{2} }{r}

Where m is mass

v is velocity

r is radius

Substitute the given values to find velocity v

So

F_{c}=\frac{mv^{2} }{r}\\v^{2}=\frac{F_{c}(r)}{m}\\ v=\sqrt{\frac{F_{c}(r)}{m}}\\ v=\sqrt{\frac{F_{c}(diameter/2)}{m}}\\v=\sqrt{\frac{(3.6N)(0.76/2)m}{(0.0012kg)}}\\v=33.764m/s

4 0
3 years ago
2. Keith took a cube and measured the mass and volume of a
galben [10]

Answer:

<h2>6 g/cm³</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question

mass = 36 g

volume = 6 cm³

We have

density =  \frac{36}{6}  = 6 \\

We have the final answer as

<h3>6 g/cm³</h3>

Hope this helps you

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2 years ago
If chilled coke and hot tea are kept together tea cools down but coke gets warm .why?​
Harlamova29_29 [7]

When hot tea is mixed to chilled coke, tea loses heat and coke gains heat. Thus, tea cools down but coke gets heated. Because it is liquid and liquid does not totally cool down to the ambient temperature, it and the iced drink will eventually reach the same temperature.

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