Physics 1- Unit 1 test review

A person riding north on a bicycle speeds up from 0 m/s to 9 m/s in 3 seconds. The acceleration of the bicycle is ______ m/s2.

3

How can the (motion) map be changed so it shows constant acceleration after the object changes direction? a. by adding vectors that are all the same length and placing them above the current top row of vectors b. by adding vectors that gradually increase in length and placing them above the current top row of vectors c. by adding vectors that are all the same length and placing them below the current bottom row of vectors d. by adding vectors that gradually increase in length and placing them below the current bottom row of vectors

a

Following an inelastic collision, what can kinetic energy be converted into? Check all that apply. a. heat b. impulse c. momentum d. potential energy e. sound

a,d,e

According to Newton's second law of motion, the acceleration of an object is inversely proportional to which quantity? a. velocity b. mass c. net force d. displacement

b

Which is an action that can cause an object to move or change its state of motion? a. energy b. force c. equilibrium d. inertia

b

Why are the action and reaction forces described by Newton's third law of motion excluded in the free-body diagram of an object? a. They are equal and opposite, so they cancel one another. b. They act on different objects, so they would not appear together. c. They are in opposite directions, so only one would appear. d. They do not happen at the same time, so only one would appear.

b

A box is being pulled by two ropes. Eduardo pulls to the left with a force of 500 N, and Clara pulls to the right with a force of 200 N. The box moves because of the two forces applied to it. Leon records the forces and direction of the forces acting on the box in his lab notebook. In the table, which force has the wrong direction? a. Tension by Eduardo b. Tension by Clara c. Kinetic friction d. Gravity

c

A large truck is moving at 22.0 m/s. If its momentum is 125,000 kg • , what is the truck's mass? a. 176 kg b. 2750 kg c. 5680 kg d. 11,400 kg

c

An elevator has a weight of 14,700 N and has an acceleration of -0.30 m/s2. The free-body diagram shows the forces acting on the elevator. To the nearest whole number, what is the force of tension, Ft, acting on the elevator? a. 450 N b. 1500 N c. 14,250 N d. 15,150 N

c