Speed of 30 kg block before it hits the ground.

Question

Want to see the full answer?

Answer 1

Question

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

Chapter 9, Problem 76P

(a)

To determine

To Find: Speed of 30 kg block before it hits the ground.

(b)

To determine

To Find: Angular speed of the pulley.

(c)

To determine

To Find: Tensions in the strings.

(d)

To determine

To Find: Time of descent.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

The 11 kg disk has an angular velocity of w = 20 rad/s. (Figure 1) Figure 400 mm 500 mm. 200 mm- ↓ B 500 mm -- P (N) 2 -t(s) 1 of 1 If the brake ABC is applied such that the magnitude of force P varies with time as shown, determine the time needed to stop the disk. The coefficient of kinetic friction at B is μk = 0.4. Neglect the thickness of the brake. Express your answer to three significant figures and include the appropriate units. t = 5.86 μА X Incorrect; Try Again; Provide Feedback S ? Nex

A 3.0-kg mass slides on a frictionless horizontal surface with a speed of 3.0 m / s when it collides with a 1.0-kg mass initially at rest as shown in the figure. The two masses stick to each other and slide on a frictionless circular wheel portion of radius 0.40 m. At what maximum height h, above the horizontal, do the masses reach? Answers: a) 0.18 m b) 0.15 m c) 0.21 m d) 0.26 m e) 0.40 m

The 11 kg disk has an angular velocity of w = 20 rad/s. (Figure 1) Figure 400 mm 500 mm 200 mm- A B ⒸO 500 mm с P (N) 5 2 1 of 1 -t(s) Part A If the brake ABC is applied such that the magnitude of force P varies with time as shown, determine the time needed to stop the disk. The coefficient of kinetic friction at B is μ = 0.4. Neglect the thickness of the brake. Express your answer to three significant figures and include the appropriate units. t = 0 Submit Value μA Provide Feedback Request Answer Units ? Next >

Answer 2

Question

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

Chapter 9, Problem 76P

(a)

To determine

To Find: Speed of 30 kg block before it hits the ground.

(b)

To determine

To Find: Angular speed of the pulley.

(c)

To determine

To Find: Tensions in the strings.

(d)

To determine

To Find: Time of descent.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 3

Question

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

Chapter 9, Problem 76P

(a)

To determine

To Find: Speed of 30 kg block before it hits the ground.

(b)

To determine

To Find: Angular speed of the pulley.

(c)

To determine

To Find: Tensions in the strings.

(d)

To determine

To Find: Time of descent.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 4

Question

Definition Definition Rate of change of angular velocity. Angular acceleration indicates how fast the angular velocity changes over time. It is a vector quantity and has both magnitude and direction. Magnitude is represented by the length of the vector and direction is represented by the right-hand thumb rule. An angular acceleration vector will be always perpendicular to the plane of rotation. Angular acceleration is generally denoted by the Greek letter α and its SI unit is rad/s 2 .

Chapter 9, Problem 76P

(a)

To determine

To Find: Speed of 30 kg block before it hits the ground.

(b)

To determine

To Find: Angular speed of the pulley.

(c)

To determine

To Find: Tensions in the strings.

(d)

To determine

To Find: Time of descent.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 5

Chapter 9, Problem 76P

(a)

To determine

To Find: Speed of 30 kg block before it hits the ground.

(b)

To determine

To Find: Angular speed of the pulley.

(c)

To determine

To Find: Tensions in the strings.

(d)

To determine

To Find: Time of descent.

Answer 6

Chapter 9, Problem 76P

(a)

To determine

To Find: Speed of 30 kg block before it hits the ground.

Answer 7

Chapter 9, Problem 76P

(a)

To determine

To Find: Speed of 30 kg block before it hits the ground.

Answer 8

(b)

To determine

To Find: Angular speed of the pulley.

Answer 9

(b)

To determine

To Find: Angular speed of the pulley.

Answer 10

(c)

To determine

To Find: Tensions in the strings.

Answer 11

(c)

To determine

To Find: Tensions in the strings.

Answer 12

(d)

To determine

To Find: Time of descent.

Answer 13

(d)

To determine

To Find: Time of descent.

Answer 14

Expert Solution & Answer

Answer 15

Expert Solution & Answer

Answer 16

Want to see the full answer?

Check out a sample textbook solution

See solution

Answer 17

Ch. 9 - Prob. 1P Ch. 9 - Prob. 2P Ch. 9 - Prob. 3P Ch. 9 - Prob. 4P Ch. 9 - Prob. 5P Ch. 9 - Prob. 6P Ch. 9 - Prob. 7P Ch. 9 - Prob. 8P Ch. 9 - Prob. 9P Ch. 9 - Prob. 10P

Speed of 30 kg block before it hits the ground.

Solution Summary: The author explains how the torque acting on the disk (pulley) is given by tau =Ialpha.

Concept explainers

Videos

To Find: Speed of 30 kg block before it hits the ground.

To Find: Angular speed of the pulley.

To Find: Tensions in the strings.

To Find: Time of descent.

Want to see the full answer?

Chapter 9 Solutions