Physics Rotational Mechanics Level: High School
A bowling ball of mass 7.14 kg and radius 8.82 cm rolls without slipping down a lane at 5.48 m/s . Calculate its total kinetic energy .
Physics Rotational Mechanics Level: High School
Calculate the moment of inertia of the array of point objects shown in the figure at “click here” about the vertical axis . (Assume the objects are connected by very light rigid wires . Assume that m = 1.66 kg and M = 3.17 kg . The array is rectangular with L1 = 1.40 m , W = 0.571 m and L2 = 0.474 m . The array is rectangular and it is split through the middle by the horizontal axis)(a) Calculate the moment of inertia of the array of point objects about the horizontal axis .
Physics Rotational Mechanics Level: High School
A person exerts a force of 40.3 N on the end of a door 82.8 cm wide . What is the magnitude of the torque if the force is exerted perpendicular to the door ?a) What is the magnitude of the torque if the force is exerted at a 60.4 degrees angle to the face of the door ?
Physics Rotational Mechanics Level: High School
Equation of rotational motion
The tires of a car make 87.0 revolutions as the car reduces its speed uniformly from 88.7 km/hr to 57.5 km/hr . The tires have a diameter of 0.906 m . What was the angular acceleration ?If the car continues to decelerate at this rate , how much more time is required for it to stop ?
Physics Rotational Mechanics Level: High School
Equation of rotational motion
A 57.0 cm diameter wheel accelerates uniformly from 202 rpm to 370 rpm in 6.08 s. How far will a point on the edge of the wheel have traveled in this time ?
Physics Rotational Mechanics Level: High School
Equation of rotational motion
The blades in a blender rotates at a rate of 7730 rpm . When the motor is turned off during operation , the blades slow to rest in 3.21 s . What is the angular acceleration as the blades slow down ?
Physics Rotational Mechanics Level: High School
A 0.400 m diameter grinding wheel rotates at 1918 rpm . Calculate its angular velocity
Physics Rotational Mechanics Level: High School
What is the tangential speed of passenger on a Ferris wheel that has a radius of 10 m and rotates once in 30 s ?
Physics Rotational Mechanics Level: High School
A pulp and paper machine has a roller that has a mass of 400 kg and a mass moment of inertia about its center of rotation of 30 kg.m^2 . How long will it take a torque of 15 N-m to accelerate the machine from 0.8 to 2.3 revolution per second ?
Physics Rotational Mechanics Level: High School
An electric motor has a rotor with a mass moment of inertia of 35 ft-lb-sec^2 . What torque is required to accelerate it from rest to 1160 rpm in 1.5 seconds ?
Physics Rotational Mechanics Level: High School
A prep cook spins a salad spinner 24.0 times in 8.00 seconds (at a constant rate ) and then stops . The salad spinner rotates 8.00 more times before it comes to rest . Assume that the spinner slows down with constant angular acceleration . What is the angular acceleration of the salad spinner as it comes to rest ?
Physics Rotational Mechanics Level: High School
What, a torque acting on a body tends to produce ?Physics Rotational Mechanics Level: High School
A person with a ponytail 25 cm long , is using a lathe which is turning at 300 rpm . The person turns their head , catching the end of the ponytail in the workplace , which has a diameter of 7 cm . How long will take the person’s head to be dragged into the lathe ?
Physics Rotational Mechanics Level: High School
Two wheels with rotational inertias 1.0 kg m^2 and 1.5 kg m^2 are rotating on the same axis at 20 rad/s and 12 rad/s respectively , in opposite directions . If the wheels are suddenly coupled together , find the common angular speed of the wheels after coupling .a) 0.80 rad/s
b) 9.1 rad/s
c) 0.40 rad/s
d) 0.57 rad/s
Physics Rotational Mechanics Level: High School
The coordinates of three particles are (5,7) , (0,3) and (-1,-1) . If the three particles have masses of 1.0 kg , 2.0 kg and 2.0 kg respectively , find the coordinates of the center of mass .a) (0.6 , -2.2)
b) (0.6 , 2.2)
c) (-0.6 , 2.2)
d) (-0.6, -2.2)
