Physics Exam: 1D Motion

During which interval(s) of the graph does the speed of the object increase by equal amounts in equal times? A 0-2s B 2-3s C 3-5s D 0-2s and 3-5s E 0-2s, 3-5s, 5-6s

0-2s and 3-5s

How far does the object move from t=0 to t=2s? A 7.5m B 10m C 15m D 20m E 25m

10m

During which interval(s) of the graph does the object travel equal distances in equal times? A 0 to 2s B 2 to 3s C 3 to 5s D 0 to 2s and 3 to 5s E 0 to 2s, 3 to 5s, and 5 to 6s

2 to 3 seconds

at what time does the object reverse its direction of motion A 1s B 2s C 5s D 1s and 2s E 2s and 5s

5 seconds

What is the acceleration of the object from t=5s to t=6s?

A +4 m/s^2 B -4 m/s^2 C +10 m/s^2 D -10 m/s^2 E +14 m/s^2

Ball A is dropped from a window. At the same instant, ball B is thrown downward and ball C is thrown upward from the same window. Which statement concerning the balls is necessarily true if air resistance is neglected? A At one instant, the acceleration of ball C is 0 B All three balls strike the ground at the same time C All three balls have the same velocity at any instant D All three balls have the same acceleration at any instant E All three balls reach the ground with the same velocity

All three balls have the same acceleration at any instant

In which section of the graph does the object have the highest speed A AB B BC C CD D DE E AB and CD

DE (steepest slope)

Position as a function of time of a moving object is presented by the graph. Which of the following is true of the type of motion? I the object moves with a constant positive acceleration II the object moves with a constant positive velocity III the slope of this graph is equal to the object's acceleration IV the slope of this graph is equal to the object's velocity V the area under this graph is equal to the object's velocity A I and II B II and IV C I, II, and V D III and V E I and v

II and IV

a person standing at the edge of a cliff throws one ball straight up and another ball straight down at the same initial speed. Neglecting air resistance, the ball is to hit the ground below the cliff with the greater speed is the one initially thrown A upward B downward C neither-they both hit at the same speed D depends on the object that was thrown

Neither-they both hit at the same speed

Can an object accelerate and have a constant speed at the same time? A No because acceleration is the rate of change of the speed of an object B No because acceleration is a vector and speed is a scalar C Yes because a change in direction will result in a change in velocity and may or may not result in a change in speed D Yes because the average speed might remain constant over time

Yes because a change in direction will result in a change in velocity and may or may not result in a change in speed

for which object will the distance equal the magnitude of the object's displacement? A a jogger runs once around a circular path B a ball rolls from rest down an inclined plane C a car travels 5 miles east, turns around and travels 2 miles west D a ball rises and falls after being thrown straight up from the earth's surface E a mass on the end of a spring bobs up and down in the gravitation field of the earth

a ball rolls from rest down an inclined plane

in which case is the displacement of the object directly proportional to the time t? A a ball rolls with constant velocity B a ball at rest is given a constant acceleration C a ball rolling with velocity v0 is given a constant acceleration D a bead falling through oil experiences a decreasing acceleration E a rocket fired from the earth's surface experiences an increasing acceleration

a ball rolls with constant velocity

Which car has westward acceleration? A a car travelling westward at constant speed B a car travelling eastward and speeding up C a car travelling westward and slowing down D a car travelling eastward and slowing down E a car starting from rest and moving toward the east

a car travelling eastward and slowing down

Two metal balls are the same size, but one weighs twice as much as the other. The balls are dropped from the top of a two-story building at the same instant of time. If we ignore air resistance, the time it takes the balls to reach the ground below will be A about half as long for the heavier ball B about half as long for the lighter ball C about the same time for both balls D considerably less for the heavier ball, but not necessarily half as long

about the same time for both balls

If a baseball has a negative velocity and a positive acceleration, the velocity A increases B decreases C remains constant D unable to determine with information given

decreases

When there is no air resistance objects of different masses A fall at equal acceleration with similar displacements B fall at different acceleration with different displacements C fall at equal acceleration with different displacements D fall at different acceleration with similar displacements

fall at equal acceleration with similar displacements

When a ball is thrown straight up with no air resistance, the acceleration of the ball at its highest point: A is upward B is downward C is zero D reverses from upward to downward E reverses from downward to upward

is downward

A ball is thrown straight up, reaches a maximum height, and then falls to its initial height. Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct? A both its velocity and its acceleration point upward B its velocity points upward and its acceleration points downward C its velocity points downward and its acceleration points upward D both its velocity and its acceleration points downward

its velocity points upward and its acceleration points downward

Starting from rest a particle that is confined to move along a straight line is accelerated at a rate of 4 m/s^2. which statement accurately describes the motion of the particle? A particle travels 4 m/s B particle travels 4 meters during first second only C speed of particle increases by 4 m/s during each second D acceleration of the particle increases by 4 m/s^2 during each second E final velocity of particle will be proportional to the distance that the particle covers

the speed of the particle increases by 4 m/s during each second