Chapter 2 Multiple Choice- Physical Science

Acceleration may result from what

A: An increase in speed B: A decrease in speed C: A change in direction D: ALL OF THE PRECEDING

Distance is to displacement as

A: Centimeters is to meters B: A vector is to a scalar C: SPEED IS TO VELOCITY D: Distance is to time

What is necessary to designate a postion

A: Fundamental units B: Motion C: Direction D: REFERENCE POINT

A football is thrown on a long pass. Compared to the ball's initial horizontal velocity, the velocity at the highest point is

A: Greater B: Less C: THE SAME

Neglection air resistance, which of the following is true for a ball thrown at an angle θ to the horizontal

A: It has a constant velocity in the + x direction B: It has a constant acceleration in the - y direction C: It has a changing velocity in the + y direction D: ALL OF THE PRECEDING ARE TRUE

Which is true for an object in free fall

A: It has frictional effects B: It has a constant velocity C: It has a constant displacement D: IT INCREASES IN DISTANCE PROPORTIONALLY TO T^2

Which one of the following is always true about the magnitude of a displacement

A: It is greater that the distance traveled B: It is equal to the distance traveled C: It is less than the distance traveled D: IT IS LESS THAN OR EQUAL TO THE DISTANCE TRAVELED

Which one of the following describes an object in motion

A: Period of time has passed B: Its position is known C: IT IS CONTINUOUSLY CHANGING POSITION D: It has reached its final position

Which one of the following is true for a deceleration

A: Velocity remains constant B: Acceleration is negative C: ACCELERATION IS IN THE DIRECTION OPPOSITE TO THE VELOCITY D: Acceleration is zero

If the speed of an object in uniform circular motion is tripled and the radial distance remains constant, then the magnitude of the centripetal acceleration increases by what factor

A: 2 B: 3 C: 4 D: 9*

In the absence of air resistance, a projectile launched at an angles of 28° above the horizontal will have the same range as a projectile launched at which of the following angles

A: 45° B: 57° C: 62°* D: 180°-33°=147°

For a constant linear acceleration, what changes uniformly

A: Acceleration B: VELOCITY C: Distance D: Displacement