Physics Exercises : Circle Motion

1. An electric drill rotates at 1200 rpm. If its motion is uniform circular motion, determine : a. angular velocity b. angular displacement after 4 s
2. An objects moves in a uniform circular motion with the speed 0f 36 km/h. If the radius of the path is 2 m, determine : a. period b. frequency c. angular velocity
3. A Peace of money is at edge of grindstone and moves in circular with constant angular velocity of 3600 rpm. Determine : a. the angular velocity b. the centripetal of acceleration if the radius of the circle is 20 cm.
4. Two wheels A and B are touching each other. If the angular velocity of wheel B is 20 rad/s and radius of wheel A is 2/3 radius wheel B, determine the angular velocity of wheel B.
5. An electric fan is switched off when it rotates with angular velocity of 16 rad/s. If the fan stops after 1,5 minutes, determine : a. the angular acceleration b. total angular displacement
6. A particle moves in a circular path with 4 m and frequency of 2 Hz. Determine the centripetal acceleration of the particle
7. A wheel reaches angular velocity of 30 rad/s from rest within 6 seconds. Determine : a. the acceleration of wheel b. the angular distance after 12 s
8. Determine the ratio of angular velocity of clock hands to indicate hour, minute, second.
9. A peace of the compact disc is rotation with 240 rpm. Then the electric is dead, the peace of compact disc have stopped take time 4 s. Determine the angular acceleration the compact disc.
10. From rest until moving with angular speed 24 rad/s, a ball takes time of 10 s. Determine the acceleration of the ball moving.
11. Two wheels A and B are touching each other. If the angular velocity of wheel B is 8 rad/s and radius of wheel A is equal to ½ of radius of wheel B, please determine the angular velocity of wheel A in rad/s.
12. Four wheels A, B, C and D. Wheel A and D are touching each other. Wheel A, wheel B, and wheel C are centre. If the angular velocity of wheel B is 8 rad/s and radius of them RA = 2 RB, RC = 3 RB, RD = 2 RC please determine the linear velocity of wheel A, B, C, and D in m/s.
13. The centripetal acceleration of a particle is 6 m/s2. Determine :
a. the radius of particle path if the particle from rest has a constant angular acceleration of 4 rad/s2 in 2 second.
b. The total acceleration of the particle
14. An electric fan is switched off when it rotates with angular velocity of 20 rad/s. If the fan stops after 2 minutes, calculate :
a. the angular acceleration
b. the total angular displacement
15. A machine requires 6 seconds to change the angular velocity from 600 rpm to 1200 rpm. Determine
a. the angular acceleration in rad/s2
b. the angular displacement traveled in 10 seconds