Force and Motion Review Introductory Physics Part A

1) What 2 factors are involved in calculating speed? a)Distance and speed b)Distance and time c)Velocity and time d)Velocity and speed Distance and time

2) What is the equation for acceleration? a) time interval/ change of velocity b) change of velocity/ time interval c) distance/time d)Time/distance change of velocity/ time interval

3 ) A bike goes from rest to 30 km/h in 20 seconds what is the acceleration? a) 1.25 b) 50 c) 10 d)

4 ) In 3 seconds a car increases its speed from 40km/h to 45km/h while a bicycle goes from rest to 5km/h which has a greater acceleration? a) car b) bike c) same d) I don’t know same

5 ) The rate at which velocity changes with time where the change in velocity may be in magnitude or direction or both. This is the definition of: a) speed b) velocity c) free fall d) acceleration acceleration

6 ) The formula for distance traveled in free fall is d = a) 1/2gt(2) b) 1/2gt 2 c) 1/2g 2 t d) 1/2tg(2) 1/2gt 2

7) The amount of matter in an object is a) weight b) mass c) volume d) area mass

8) The amount of space taken up by an object is a) weight b) mass c) volume d) surface area volume

9) “Every material object continues in its state of rest, or in uniform motion in a straight line, unless acted upon by an unbalanced force.” What is this law? a) Newton’s first law b) Newton’s 2 nd law c) Newton’s 3 rd law d) Momentum law Newton’s first law

10 ) The acceleration of an object is directly proportional to the a) mass b) force c) speed d) velocity force

11 ) What is force? a) potential energy b) a push or a pull c) work d) kinetic energy A push or a pull

12 ) Acceleration is inversely proportional to: a) force b) mass c) work d) pressure mass

13 ) When the acceleration of an object is zero, we say that the object doing what? a)Free falling b) changing direction c) speeding up d) constant motion or staying still Constant motion or staying still

14 ) For every action force there is an equal and opposite: a) energy flow b) acceleration c) reaction force d) Newton's 3 rd law reaction force

15 ) Which of the following are most important in determining the amount of gravity between two objects? a) time and weight b) Mass and distance c) Force and mass d) distance and weight Mass and distance

16 ) What law is this: F = Gm 1 m 2 d 2 a) Ohm’s Law b) Coulomb’s Law c) Law of Universal Gravitation d) Newton’s 1 st Law of Motion Law of Universal Graviation

17 ) What is density? a) how heavy an object is b) force/area c) mass/volume d) weight/volume Mass/volume

18 ) Calculate the speed of a car that went 144 miles in 1 hour 30 minutes a) 96 mph b) 216 mph c) 72 mph d) 115 mph 96 mph

19 ) What is the force required to accelerate a 32 kg. box at a rate of 3 m/s 2 ? a)35 N b) 96 N c) N d) There are several forces 96 N

20 ) Newton’s second law states a)F= ma b) P1V1 = P2V2 c) D = m/v d) P = force/area F= ma

21 ) An object that is in free fall but not accelerating any more must be a) on the ground b) experiencing c) At terminal velocity d) deceased At terminal velocity

22 ) After 4 seconds of free fall, an object should be traveling at ___ m/s a) 10 b) 15 c) 25 d) 40 40

23 ) The weight of a 2 kg. Box of chocolates would be____ N. a) 2 b) 20 c).2 d) 12 20

24 ) What is the net force if an object is pushed west with a force of 5 N and east with a force of 25 N. a) 20 N east b) 20 N west c) 30 N east d) 30 N west 20 N east

25 ) A force vector shows both ________ and direction. a) pressure b) Magnitude (amount) c) energy d) power Magnitude (amount)

26 ) A car and a truck collide head-on. The car has a mass half that of the truck. The impact force of the truck on the car is 500 N. what is the impact force of the car on the truck a) 250 N b) 500 N c) 750 N d) Not sure 500 N

27 ) An object following a straight-line path at constant speed a) has zero acceleration b) Must be moving in a vacuum or in the absence of air friction. c) Has no forces acting on it d) Has a net force acting in the direction of motion has zero acceleration

28 ) 74 cm = ____ m a) 0.74 b) 7.4 c) 7400 d) None of these 0.74

28 ) 478 mL = ____ L a) b) 4.78 c) 4780 d) None of these 0.478

29) Which of the following graphs shows the relationship between mass and acceleration? a) b) c) None of these a a b