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3 years ago

5. You are pulling a rubber sneaker along concrete

Physics

1 answer:

Ainat [17]3 years ago

3 0

Answer:

Fs = 17.66 N

Explanation:

The force of static friction is given by the following formula:

$F_s = \mu R = \mu W\\$

where,

Fs = The force of static friction = ?

μ = coefficient of static friction = 0.9

W = weight of sneakers = mg

m = mass of sneakers = 2 kg

g = acceleration due to gravity = 9.81 m/s²

Therefore,

$F_s = \mu mg\\F_s = (0.9)(2\ kg)(9.81\ m/s^2)\\$

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Read 2 more answers

Holly puts a box into the trunk of her car. Later, she drives around an unbanked curve that has a radius of 48 m. The speed of t

LiRa [457]

Answer:

The minimum coefficient of friction is 0.544

Solution:

As per the question:

Radius of the curve, R = 48 m

Speed of the car, v = 16 m/s

To calculate the minimum coefficient of static friction:

The centrifugal force on the box is in the outward direction and is given by:

$F_{c} = \frac{mv^{2}}{R}$

$f_{s} = \mu_{s}mg$

where

$\mu_{s}$ = coefficient of static friction

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