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Chapter 13

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Physics I for Physicists & Engineers 2020

Test 5 Chapter 11, 12: 5 June 2020

Table of Contents

Time Remaining: 0:34:45

Part 1 of 7 - QUESTION 1

Question 1 of 7

2 Points

A 800 kg car enters a 300-m radius horizontal curve on a rainy day when the coefficient of static friction between its tires and the road is 0.60. What is the maximum speed at which the car can travel around this curve without sliding?

Take acceleration due to gravity as 9.8 m/s²

A.

33.1 m/s

B.

24.8 m/s

C.

37.9 m/s

D.

29.6 m/s

E.

42.0 m/s

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Part 2 of 7 - QUESTION 3

Question 2 of 7

4 Points

A slender uniform rod of length L = 100.00 cm long is used as a meter stick. Two parallel axes that are perpendicular to the rod are considered. The first axis passes through the 50-cm mark and the second axis passes through the 30-cm mark. What is the ratio of the moment of inertia I₂ through the second axis to the moment of inertia I₁ through the first axis?

I_rod (center) = 112 mL²

A.

I₂/I₁ = 0.95

B.

I₂/I₁ = 1.48

C.

I₂/I₁ = 1.70

D.

I₂/I₁ = 2.08

E.

I₂/I₁ = 2.31

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Part 3 of 7 -

Question 3 of 7

3 Points

What follows is a calculated question with 1 blanks.

A bicycle is traveling at a velocity 4.7 m/s. The mass of the wheel, 5.5 kg, is uniformly distributed along the rim, which has a radius of 25.7 cm. The magnitude of the angular momentum of the wheel about its axle is Blank 1. Calculate the answer by read surrounding text. kg•m²/s

Type your answer in the block provided accurate to one decimal place. Use a full stop for the decimal. Do not use a comma. Only type numbers in your answer. Do not use letters.

Part 4 of 7 - Question 4

Question 4 of 7

2 Points

You release a yo-yo from your hand (the thread connects with your finger), during the fall of the yo-yo:

A.

The acceleration is equal to the acceleration due to gravity, g.

B.

It is impossible to tell whether the acceleration will be larger or smaller than the acceleration due to gravity, .

C.

The acceleration is larger than the acceleration due to gravity,g

D.

The acceleration depends on the inertia and the radius of the yo-yo.

E.

The acceleration is smaller than the acceleration due to gravity, g

Answer 1

N Le - UN my Centripetal sle friction 9 fs = muz M N = muz eng un uz R [ {fy=0 ing ņ V max= Jugr Sou6x9.8x300 42 m/s option = 기