Blog

A centrifuge in a medical laboratory rotates from rest to an angular speed of 3,800 rpm (revolutions per minute) while making 86.0 complete rotations. Find the time required to reach maximum speed, assuming uniform acceleration.

An object moves around a circle and its linear speed is always increasing. Which statement is always true?

An object with constant acceleration has velocity of 12 m/s when its position is x = 8 m. At another position x = 16 m, its velocity is 20 m/s. Its acceleration is

A helicopter lifts off at a constant acceleration of upward. What is the height of the helicopter 2.5 s after liftoff?

The fraction of a square kilometer in a square millimeter is

A roller coaster includes a circular vertical loop with radius 16.0 m. For what linear speed at the top of the loop will the passengers feel weightless?

Two forces, one with magnitude 10 N and the other with magnitude 15 N, are directed as shown in the diagram below. What is the magnitude of a third force which would exactly balance these two forces, so that the sum of all three forces would be zero?

A sports utility vehicle has tires which are 110 cm in diameter. If the wheel is rotated through 30 revolutions, how far forward does a point on the tire travel?

A fellow student found in the performance data of his new car the velocity-versus-time graph shown in the figure. The average acceleration of his car from second 0 to second 24 is

The number of centimeters in 2.50 miles is