A race car is moving on a circular track with a radius of 50 kilometers. If the car's speed is 70 km/hr, determine the magnitude of the centripetal acceleration.
A. 3500 m/s^2
B. 1.4 m/s^2
C. 0.71 m/s^2
D. 98 m/s^2

A12-kg bag of groceries is tossed onto a table at 4.0 m/s and slides to a stop in 2.2 s . modify the equation fδt=δ (mv) to find the force of friction.

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?