3 years ago

Mary just received a traffic ticket but decided it is not worth being upset about. Mary just made a__________.

Physics

1 answer:

harkovskaia [24]3 years ago

7 0

Mary just received a traffic ticket but decided it is not worth being upset about. Mary just made a primary appraisal

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A bowler throws a bowling ball of radius R = 11 cm down the lane with initial speed v₀ = 7.5 m/s. The ball is thrown in such a w

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Answer:

a) t = 0.74s

b) D = 4.76m

c) Vf = 5.35m/s

Explanation:

The ball starts rolling when Vf = ωf*R.

We know that:

Vf = Vo - a*t

ωf = ωo + α*t

With a sum of forces on the ball:

$Ff = m*a$

$\mu*N = m*a$

$\mu*m*g = m*a$

$a=\mu*g=2.9m/s^2$

With a sum of torque on the ball:

$Ff*R = I*\alpha$

$\mu*m*g*R = 2/5*m*R^2*\alpha$

$\alpha=5/2*\mu*g/R=65.9rad/s^2$

Replacing both accelerations:

$Vo - a*t=\alpha*t*R$

$7.5 - 2.9*t=65.9*t*0.11$

t=0.74s

The distance will be:

$D = Vo*t-1/2*a*t^2$

$D = 4.76m$

Final velocity:

$Vf=Vo-a*t$

Vf=5.35m/s

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2 years ago

A negative slope on the velocity vs. time graph indicates that the object is not accelerating

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However, the acceleration is the opposite of the movement:

Explanation:

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A projectile is launched at an angle of 60 degrees to the horizontal at an initial speed of 10 meters per second. What is the ma

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Answer:

5 sq. root 3

Explanation:

theta= 60°

=> u sin theta = 10 × sin 60

= 10× sq. root 3/2

= 5 sq. root 3

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Step 1 : Get your supply list together

Step 2 : Pick what model you want to do

Step 3 : Ask for a partner

Step 4 : Complete the model and take your time.

Step 5 : Read the directions carefully

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