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Andone is a 88-kg man.The woman movés away wih spel0l D) 4.07 m/s C) 0.75 m/s A) -15 m/s B) 5.0 m...
During a rain storm, rain comes straight down with a velocity Vi = -15 m/s and...
During a rain storm, rain comes straight down with a velocity Vi = -15 m/s and hits the roof of a car perpendicularly. The mass of the rain per second that strikes the roof is 0.060 kg every second. Assuming that the rain comes to rest upon striking the car (Vf = 0 m/s), find the average force exerted by the rain on the roof during a 3 second time interval.
A wheel with a moment of inertia of 5 kg-m² is turning at an angular velocity...
A wheel with a moment of inertia of 5 kg-m² is turning at an angular velocity of » = 25 rad/s. If the wheel is subject to a net torque of t= -0.75 N•m, how much time does the wheel take to come to a stop? A. 6.67 s B. 1.3 s C. 166.7 s D. 23.3 s E. 147.1 s
A 0.3 kg ball falls down and hits the floor with a speed of 15 m/s....
A 0.3 kg ball falls down and hits the floor with a speed of 15 m/s. Then it bounces up with a speed of 9 m/s. The impulse that acts on the ball is equal to: Select one: a. 7.20 N.s downwards stion b. 7.20 N.s upwards C 1.80 Ns upwards d. 1.80 N.s downwards
3. A large board L = 6.00 m and m = 25.0 kg is laying so...
3. A large board L = 6.00 m and m = 25.0 kg is laying so that d = 1.00 m of the board hangs off the roof of a building. A contractor puts his toolbox on the end of the board as shown. What is the greatest mass the toolbox can have and not cause the board to flip up and slide off the roof? A. 12.5 kg B. 25.0 kg C. 50.0 kg D. 245.0 kg 4. A...
Question 15 (1 point) A 19 kg block with an initial velocity of 19 m/s slides...
Question 15 (1 point) A 19 kg block with an initial velocity of 19 m/s slides across a horizontal surface and comes to rest. It takes the block 4 s to stop. The stopping force acting on the block is about Your Answer: Answer Question 16 (1 point) A tow truck exerts a force of 4,000 N on a car, accelerating it at 3 m/s. What is the mass of the car, in kg? Your Answer: Answer
A 1500-kg car starts from rest and accelerates uniformly to 18.0 m/s in 12.0 s over...
A 1500-kg car starts from rest and accelerates uniformly to 18.0 m/s in 12.0 s over a dry concrete road. Assume that kinetic friction remains constant at 400 N during this time. – (a) Find the net work done on the car and the work done by the engine. – (b) How many revolutions does each tire make over the 12.0 s interval? What is the angular speed of the wheels when the car has traveled half the total distance?...
a. 1.21 rad/s b. 0.829 rad/s c. 2.95 rad/s d. 0.229 rad/s e. 0.829 rad/s A...
a. 1.21 rad/s
b. 0.829 rad/s
c. 2.95 rad/s
d. 0.229 rad/s
e. 0.829 rad/s
A playground merry-go-round of radius R = 2.10 m has a moment of inertia of I = 260 kgm2 and is rotating at 11.0 rev/min about a frictionless vertical axis. Facing the axle, a 23.0 kg child hops on to the merry-go-round and manages to sit down on its edge. What is the new angular speed of the merry-go-round?
Show all work. Rate will be given. A 1.6 m long rod has mass 7.2 kg....
Show all work. Rate will be given.
A 1.6 m long rod has mass 7.2 kg. If the rotation axis is located at one end of the rod, then find its moment of inertia. 18. a. 6.567 kg.m2 7.454 kg·m 2 6.618 kg㎡ d. 6.350 kg.m2 e. 6.144 kg.m2 f. 5.210kg-m A 220 kg disk (with uniform density) is shown below. Its rotation axis is through its center. The applied force: and F2 are 27 N and 31_N, respectively. If...
8) During a collision with a wall,the velocity of a 0.200-kg ball changes from 20.0 m/s...
8) During a collision with a wall,the velocity of a 0.200-kg ball changes from 20.0 m/s toward the wall to 12.0 m/s away from the wall. If the time the ball was in contact with the wall was 60.0 ms, what was the magnitude of the average force applied to the ball? A) 26.7 N B) 13.3 N C) 107N D) 40.0 N E) 16.7 N 10) A 5.0-m radius playground merry-go-round with a moment of inertia of 2000 kg.m2...
A wheel with a moment of inertia of 5 kg-m² is turning at an angular velocity of » = 25 rad/s. If the wheel is subject to a net torque of t= -0.75 N•m, how much time does the wheel take to come to a stop? A. 6.67 s B. 1.3 s C. 166.7 s D. 23.3 s E. 147.1 s
A 0.3 kg ball falls down and hits the floor with a speed of 15 m/s. Then it bounces up with a speed of 9 m/s. The impulse that acts on the ball is equal to: Select one: a. 7.20 N.s downwards stion b. 7.20 N.s upwards C 1.80 Ns upwards d. 1.80 N.s downwards
3. A large board L = 6.00 m and m = 25.0 kg is laying so that d = 1.00 m of the board hangs off the roof of a building. A contractor puts his toolbox on the end of the board as shown. What is the greatest mass the toolbox can have and not cause the board to flip up and slide off the roof? A. 12.5 kg B. 25.0 kg C. 50.0 kg D. 245.0 kg 4. A...
Question 15 (1 point) A 19 kg block with an initial velocity of 19 m/s slides across a horizontal surface and comes to rest. It takes the block 4 s to stop. The stopping force acting on the block is about Your Answer: Answer Question 16 (1 point) A tow truck exerts a force of 4,000 N on a car, accelerating it at 3 m/s. What is the mass of the car, in kg? Your Answer: Answer
a. 1.21 rad/s
b. 0.829 rad/s
c. 2.95 rad/s
d. 0.229 rad/s
e. 0.829 rad/s
A playground merry-go-round of radius R = 2.10 m has a moment of inertia of I = 260 kgm2 and is rotating at 11.0 rev/min about a frictionless vertical axis. Facing the axle, a 23.0 kg child hops on to the merry-go-round and manages to sit down on its edge. What is the new angular speed of the merry-go-round?
Show all work. Rate will be given.
A 1.6 m long rod has mass 7.2 kg. If the rotation axis is located at one end of the rod, then find its moment of inertia. 18. a. 6.567 kg.m2 7.454 kg·m 2 6.618 kg㎡ d. 6.350 kg.m2 e. 6.144 kg.m2 f. 5.210kg-m A 220 kg disk (with uniform density) is shown below. Its rotation axis is through its center. The applied force: and F2 are 27 N and 31_N, respectively. If...
8) During a collision with a wall,the velocity of a 0.200-kg ball changes from 20.0 m/s toward the wall to 12.0 m/s away from the wall. If the time the ball was in contact with the wall was 60.0 ms, what was the magnitude of the average force applied to the ball? A) 26.7 N B) 13.3 N C) 107N D) 40.0 N E) 16.7 N 10) A 5.0-m radius playground merry-go-round with a moment of inertia of 2000 kg.m2...
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