Engineering Board Exam Reviewer · Physics · medium

A force of 50 N is applied tangentially to the rim of a wheel of radius 0.4 m. What torque is produced?

  1. 125 N· m
  2. 50 N· m
  3. 0.008 N· m
  4. 20 N· m

Answer

D. 20 N· m

Solution

= Fr = 50(0.4) = 20 N· m.

More Physics questions

  1. A solid cylinder rolls without slipping down a 30° incline. What is its linear acceleration? (g = 9.81 m/s2)
  2. A flywheel with a moment of inertia of 0.45 kg· m2 rotates at 1200 rpm. What is its rotational kinetic energy?
  3. What is the moment of inertia of a solid disk of mass 10 kg and radius 0.3 m about its central axis?
  4. A 20 g bullet moving at 300 m/s embeds itself in a 2 kg wooden block hanging as a ballistic pendulum. How high does the block rise? (g =…
  5. A ball dropped from a height of 2 m rebounds with a coefficient of restitution of 0.8. How high does it rise after the first bounce?
  6. A 2 kg ball moving at 5 m/s makes a head-on, perfectly elastic collision with a stationary 3 kg ball. What is the velocity of the 3 kg…
  7. A 2000 kg truck moving at 10 m/s collides with a stationary 1000 kg car and they stick together. What percentage of the initial kinetic…
  8. A 2000 kg truck moving at 10 m/s collides with a stationary 1000 kg car, and they stick together. What is their common velocity just after…
  9. A bat delivers an impulse of 13.5 N· s to a ball during a contact time of 5 ms. What is the average force on the ball?
  10. A 0.15 kg ball moving at 40 m/s is hit back in the opposite direction at 50 m/s. What is the magnitude of the impulse on the ball?

All Physics Reviewer questions