A wooden ball with a mass of 0.45 kg is at rest when it is tapped by a wooden mallet that applies an average force of 83 N to the ball. After contact with the mallet, the ball moves forward at 1.3 m/s. How long was the mallet in contact with the ball? A 7.0 milliseconds B. 3.7 milliseconds C. 2.4 milliseconds D. 0.59 milliseconds​

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2. a. 9.5 m b. 11.9 m c. 15.2 m d. 23.8 m

Atorque acting on an object tends to produce a. equilibrium b. rotation c. linear motion d. velocity e. a center of gravity