A rotating object starts from rest at t = 0 s and has a constant angular acceleration. At a time of t = 2.5 s the object has an angular displacement of 24 rad. What is its displacement θ at a time of t = 5.0 s?
A rotating object starts from rest at t = 0 s and has a constant angular...
A wheel 1 m in radius starts rotating from rest with a constant angular acceleration of 4 rad/s2 At t = 2 s find: a) the angular speed of the wheel; b) the tangential speed of the wheel at the rim; c) the centripetal and tangential acceleration of the wheel at the rim; d) the angular displacement.
A Ferris wheel undergoes a constant angular acceleration as it starts from rest and builds up to a final angular speed of 1.9 rad/s while rotating through an angular displacement of 4.9 rad. Find its angular acceleration.
A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration of 1.0 rad/sec2 acquires an angular velocity of 5.0 rad/sec. The CD continues rotating at 5.0 rad/sec for 15.0 seconds and then slows to a stop in 12.0 second with a constant angular acceleration. What is the radial acceleration of a point 4.0 cm from the center at the time 2.0 seconds from the start? a. 0.28 m/s2 b. 0.16 m/s2 c. 0.30...
Problem 1: A wheel starts from rest and rotates with constant angular acceleration and reaches an angular velocity of 32.0 rad/s in 4.00 s. (a) What is the magnitude of the angular acceleration of the wheel? (b) Through what angle does the wheel rotate in these 4.00 s? Problem 2: An automobile traveling at 90.0 km/hour, has tires of 75.0 cm diameter. (a) What is the angular velocity of the tires about the axis of rotation? (b) If the car...
A record on a turntable starts from rest and begins rotating at an angular acceleration of 0.3 rev/s for 2s. After 2s, it maintains its velocity and rotates at this constant angular speed. A) What is the angular speed of the record after the first 2s? B) What is the total angular displacement after 10s?
a dentist drill starts from rest. After constant angular acceleration , it turns at a rate of 1310 rad/s. The angular displacement through which the drill rotates during this time is 1637 rad. Find the angular acceleration of the drill
A disk starts spinning from rest at t=0, with a constant angular acceleration of 1.2 rad/s2. The radius of the disk is 0.4 m. Consider a bug clinging to the outer edge of the disk. What is the magnitude of the acceleration felt by this bug at t=1 s? Choose the closest answer.
A discus thrower starts from rest and begins to rotate with a constant angular acceleration of 2.5 rad/s2 . Part A:How many revolutions does it take for the discus thrower's angular speed to reach 6.3 rad/s ? Part B: How much time does this take?
A wheel starts from rest and has an angular acceleration of 3.6 rad/s 2. When it has made 24 rev, what is its angular velocity?
A 39.2-cm diameter disk rotates with a constant angular acceleration of 2.8 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this time. (a) Find the angular speed of the wheel at t 2.30 s. rad/s 2.30 s (b) Find the linear velocity and tangential acceleration of P at t...