Physics Waves And Oscillations Level: High School
A ping-pong ball weighs 2.5*10^-2N. The ball is placed inside a cup that sits on top of a vertical springs . If the spring is compressed 0.055 m and released , the maximum height above the compressed position that the ball reaches is 2.84 m . Neglect air resistance and determine the spring constant .
Physics Waves And Oscillations Level: High School
A ball hung from a vertical spring oscillates in simple harmonic motion with an angular frequency of 2.6 rad/s and an amplitude of 0.075 m. what is the maximum acceleration of the ball ?
Physics Waves And Oscillations Level: High School
Spring Constant
Gina’s favorite exercise equipment at the gm consists of various springs . In one exercise , she pulls a handle grip attached to the free end of a spring to 0.80 m from it unstrained position . The other end of the spring (spring constant = 53 N/m ) is held in place by the equipment frame . What is the magnitude of the force that Gina is applying to the handle grip ?Physics Rotational Mechanics Level: High School
Conservation of Angular Momentum
A solid spheres of radius R rotates about a diameter with an angular speed omega . The sphere then collapses under the action of internal forces to a final radius R/2 . What is the final angular speed of the sphere ?
Physics Rotational Mechanics Level: High School
Rotational Kinetic Energy
A 50-kg rider on a moped of mass 75 kg is traveling with a speed of 20 m/s . Each of the two wheels of the moped has a radius of 0.2 m and a moment of inertia of 0.2 kg*m^2 . What is the total rotational kinetic energy of the wheels ?
Physics Rotational Mechanics Level: High School
A string is wrapped around a pulley of radius 0.10 m and moment of inertia 0.15 kg*m^2 . The string is pulled with a force of 12 N . What is the magnitude of the resulting angular acceleration of the pulley ?
Physics Rotational Mechanics Level: High School
Moment of Inertia
Two uniform solid spheres , A and B have the same mass . The radius of sphere B is twice that of sphere A . The axis of rotation passes through each sphere . Which one of the following statements concerning the moments of inertial are true ?a) The moment of inertia of A is ¼ that of B .
b) The moment of inertia of A is ½ that of B .
c) The moment of inertia of A is 5/4 that of B .
d) The moment of inertia of A is 5/8 that of B .
e) The two spheres have equal moments of inertia .
Physics Rotational Mechanics Level: High School
Centre of Gravity
Consider four point masses located as shown in the sketch at “click here” . The acceleration due to gravity is the same everywhere . What is the x coordinate of the center of gravity for this system ?
Physics Rotational Mechanics Level: High School
Rotational Equilibrium
An 80-kg man balances the boy on a teeter-totter as shown in the figure at “click here” . What, approximately , is the magnitude of the downward force exerted on the fulcrum ?
Physics Kinematics Level: High School
Complete the following statements : A body is in translational equilibriuma) Only if it is a rest
b) Only if it is moving with constant velocity .
c) If it is either at rest or moving with a constant velocity .
d) If it is moving with either constant velocity or constant acceleration .
Physics Rotational Mechanics Level: High School
A 12-N force is applied 7.0 cm from the axis of rotation . What is the torque due to the applied force ?
Physics Rotational Mechanics Level: High School
A circular hoop rolls without slipping on a flat horizontal surface . Which one of the following is necessarily true ?a) All point on the rim of the hoop have the same speed .
b) All points on the rim of the hoop have the same velocity .
c) Every point on the rim of the wheel has a different velocity .
d) All points on the rim of the hoop have acceleration vectors that are tangent to the hoop .
e) All points on the rim of the hoop
Physics Rotational Mechanics Level: High School
A rigid body rotates about a fixed axis with a constant angular acceleration . Which one of the following statements is true concerning the tangential acceleration of any point on the body ?a) Its magnitude is zero m/s^2 .
b) It depends on the angular velocity .
c) It is equal to the centripetal acceleration
d) It is constant in both magnitude and direction .
e) It depends on the change in the angular velocity .
Physics Rotational Mechanics Level: High School
Equation of Rotational Motion
What is the tangential speed of a lug nut on the wheel of a car if the lug nut is located 0.114 m from the axis of rotation and the wheel is rotating at 6.53 rev/sec ?
Physics Rotational Mechanics Level: High School
Equation of Rotational Motion
A roulette wheel with a 1.0-m radius reaches a maximum angular speed of 18 rad/s before it stops 35 revolutions (220 rad) after attaining top speed . How long did it take the wheel to stop ?