Only 5 questions 1.which answer represents a speed, not a velocity? a. 35 m/s east b. –35 m/s down c. 35 m/s d. 35 m/s south 2.a car traveled at an average speed of 60 mph for two hours. how far did the car travel? a. 30 miles b. 60 miles c. 120 miles d. 150 miles 3.a car goes from point a to point b then back again. which statement about its speed and velocity is true? a. they are the same. b. the velocity is twice the speed. c. the speed is twice the velocity. d. the velocity is zero but the speed is positive. 4.a car goes from point a to point b, five miles away and then returns to point a. the car is going 15 mph. what is the velocity of the car? a. –30 mph b. 0 mph c. +15 mph d. +45 mph 5.a cyclist rode at an average speed of 15 mph for 30 miles. how long was the ride? a. 0.5 hours b. 1 hour c. 2 hours d. 3 hours

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_

Atennis player used a tennis racket to hit a tennis ball with a mass of 0.25 kg with a force of 5.25 newtons. how does the force the tennis racket exerted on the tennis ball compare with the force the tennis ball exerted on the tennis racket? a. the force of the tennis racket on the tennis ball is equal in magnitude and opposite in direction to the force the tennis ball exerted on the tennis racket. b. the force of the tennis racket on the tennis ball is equal in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. c. the force of the tennis racket on the tennis ball is less in magnitude and in the same direction as the force the tennis ball exerted on the tennis racket. d. the force of the tennis racket on the tennis ball is greater in magnitude and opposite in direction as the force the tennis ball exerted on the tennis racket.