Physics Final Review

Which statement about the movement of an object with 0 acceleration is true?

the object may be in motion

A baseball bat moving at high velocity strikes a feather. If air resistance is neglected, compared to the force exerted by the bat on the father, the force exerted by the feathers on the bat will be

the same

Distance is to displacement as speed is to

velocity

Which two quantities are measured in the same units

weight and force

A net force of 5.0 x 10^2 newtons causes an object to accelerate at a rate of 5 m/s squared. What is the mass of the object

1 x 10^2 kilogram

A student walks 1 kilometer due east, and 1 kilometer due south. Then she runs 2 kilometers due west. The magnitude of the students resultant displacement is closest to

1.4 kilometers

A 60 kilogram astronaut weighs 96 Newtons on the surface of the moon. The acceleration due to gravity on the moon is

1.6 m/s squared

A 5.0 kilogram cart moving with a velocity of 4 m/s is brought to a stop in 2 seconds. The magnitude of the average force used to stop the cart is

10 Newtons

The distance time graph below represents the position of an object moving in a straight line. What is the speed of the object during the time interval t = 2.0 seconds to t = 4.0 seconds

10 m/s

The graph below represents the relationship between speed and time for a moving in a straight line. The magnitude of the car's acceleration is?

10 m/s squared

An object has a constant acceleration of 2 m/s squared. The time required for the object to accelerate from 8 m/s to 28 m/s is?

10 seconds

The approximate height of a high school physics student is?

10^0 m

Twp perpendicular forces act on an object 5 Newtons right and 12 Newtons down. What is the magnitude of the resulting force

13 Newton

What is the total displacement of a student that walks 3 blocks east, 2 blocks north, 1 block west, and 2 blocks south

2 blocks east

A table exerts a 2 Newton force on a book lying on the table. The force exerted by the book on the table is

2.0 Newton

What is the weight of the 5.0 kilogram object at the surface of the Earth

49 Newton

The magnitude of the force that a baseball bat exerts on the ball is 50 Newtons. The magnitude of the force that the ball exerts on the bat is

50 Newtons

The average speed of a runner in a 400 meter race is 8 m/s. How long did it take the runner to complete the race

50 seconds

A force of 100 Newtons is applied to an object at an angle of 30 degrees from the horizontal as shown in the diagram below. What is the magnitude of the vertical component of this force?

50.0 Newton

What is a scalar quantity

distance

A toy projectile is fired from the ground vertically upward with an initial velocity of 29 m/s. The projectile arrives at it's maximum altitude in 3 seconds (neglect air resistance). What is the velocity of the projectile when it hits the ground?

-29 m/s

A blinking light of constant period is situated on a lab cart. Which diagram best represents a photograph of the light as the cart moves with constant velocity.

. . . . . . .

A bullet traveling at 5 x 10^2 m/s is brought to rest by an impulse of 5 newtons seconds. What is the mass of the bullet

.0 x 10^-1 kilograms

A baseball pitcher throws a fast ball at 42 m/s. If the batter is 18 meters from the pitchers, approximately how much time does it take for the ball to reach the batter.

.43 seconds

The graph below represents the motion of an object traveling in a straight line as a function of time. What is the average speed of the object during the first 4 seconds

.5 m/s

A flashing light of constant .20 second period is situated on a lab cart. The diagram below represents a photograph of the light as the cart moves across a tabletop. How much time has elapsed as the cart moved from position A to position B . . . . . .

.80 seconds

What is an essential characteristic of an object in equilibrium

0 acceleration

Two forces act on an object concurrently. The resultant will be greater when the angle between the forces is

0 degrees

A book is pushed with an initial horizontal velocity of 5 m/s off the top of a desk. What is the initial vertical velocity of the book?

0 m/s

A bird feeder with two birds has a total mass of 2.0 kilograms and is supported by the wire as shown in the diagram below. The force in the top wire is approximately

20 Newtons

A car travels 20 meters east in one second, the displacement of the car at the end is

20 meters east

An object accelerates uniformly form rest to a speed of 50 m/s in 5 seconds, the average speed of the object during the 5 second interval is?

25 m/s

The velocity of a car changes from 60 m/s north to 45 m/s north in 5 seconds. The magnitude of the cars acceleration is

3 m/s squared

If a woman runs 100 m north, and then 70 m south her total displacement is

30 meters north

A boat initially traveling at 10 m/s accelerates uniformly at the rate of 5 m/s squared for 10 seconds. How far does the boat travel during this time?

350 meters

A 1,000 kilometer car traveling with a velocity of +20 m/s decelerates uniformly at -5.0 m/s squared, until it comes to rest. What is the total distance the car travels as it decelerates the rest?

40 meters

A box decelerates as it moves to the right along a horizontal surface, as shown in the diagram below. What vector best represents the force on the box

<-------

The displacement-time graph below represents the motion of a cart along a straight line

AB

A student weighing 500 Newtons stands on a spring scale on an elevator. If the scale reads 520 Newtons, the elevator must be

Accelerating upward

As shown in the diagram below, an astronaut on the moon is holding a baseball and a balloon. The astronaut releases both objects at the same time. What does the astronaut observe? (NOTE: the moon has no atmosphere)

The baseball and balloon fall at the same rate

Which statement explains why a book resting on a table is in equilibrium

The weight of the book and the table's upward force on the book are equal in magnitude but opposite in the direction

The graph below represents the motion of a body moving along a straight line. According to the graph, which quantity related to the motion of the body is constant.

acceleration

Which is constant for a freely falling object?

acceleration

A freely falling object near the Earth's surface has a constant

acceleration of 9.81 m/s squared

A cart is uniformly accelerating from rest. The net force acting on the cart is

constant

The graph below represent the motion of a body that is moving with

constant speed

vector quantity and the scalar quantity of the vector's magnitude

displacement and distance

Which term represents a vector quantity

force

As the vector sum of all the forces acting on an object's increases, the acceleration of the object

increases

A moving body must undergo a change of

position

A toy projectile is fired from the ground vertically upward with an initial velocity of 29 m/s. The projectile arrives at it's maximum altitude in 3 seconds (neglect air resistance). As the projectile rises and falls back to the ground, it's acceleration

remains the same