Physics Final Study Set, Test 1

An object's weight may properly be expressed in units of meters. cubic centimeters. kilograms. newtons.

newtons.

An apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about 15 m/s. 5 m/s. 20 m/s. 10 m/s. not enough information given to estimate

10 m/s.

If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by about a variable amount. 5 m/s. 10 m/s. 15 m/s. depends on its initial speed

10 m/s.

A baseball player bats a ball with a force of 1000 N. The reaction force that the ball exerts against the bat is 1000 N. impossible to determine. less than 1000 N. more than 1000 N.

1000 N.

A 1 kilogram mass weighs approximately 10 pounds. 5 pounds. 2 pounds. 1 pound.

2 pounds.

1 meter is approximately how many feet? 2 ft 4 ft 3 ft 1 ft

3 Ft

If a car increases its velocity from zero to 60 km/h in 10 seconds, its acceleration is 3 km/h/s. 10 km/h/s. 600 km/h/s. 6 km/h/s 60 km/h/s.

6 km/h/s

True or false, a car traveling around a circle at a constant speed of 40 m/s is accelerating.

True

True or false, if air resistance is a factor, heavy objects fall faster then light objects.

True

True or false, one coffee filter reaches terminal velocity and falls 1 m/s. Four filters stacked together will fall faster.

True.

If no external forces are acting on a moving object, it will continue moving at the same speed. move slower and slower until it finally stops. continue moving at the same velocity.

continue moving at the same velocity.

A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always directed downward. in the direction of motion. opposite its velocity. directed upward.

directed downward.

The two measurements necessary for calculating average speed are distance and time. distance and acceleration velocity and distance. velocity and time. acceleration and time.

distance and time.

As the speed of a moving object increases, the air resistance (drag) remains the same. decreases. increases.

increases.

For an action force, there must be a reaction force that is exactly equal in magnitude. always acts in the same direction. is slightly larger in amplitude than the action force. is slightly smaller in magnitude than the action force.

is exactly equal in magnitude.

The inertia of an object is determined by measuring its mass. volume. temperature. speed.

mass.

In which case would you have the largest mass of gold? If your chunk of gold weighed 1 N on Earth. Jupiter. moon.

moon.

When a rocket ship accelerating in outer space runs out of fuel, it accelerates for a short time, then slows down to a constant velocity. no longer accelerates. accelerates for a short time, slows down, and eventually stops.

no longer accelerates.

As a ball falls, the action force is the pull of Earth on the ball. The reaction force is the acceleration of the ball. pull of the ball's mass on the Earth air resistance acting against the ball. none of these

pull of the ball's mass on the Earth

A car accelerates at 3 meters per second per second. Assuming the car starts from rest, how many seconds does it need to accelerate to a speed of 30 m/s? 2.0 seconds. 60 seconds. 30 seconds. 10 seconds.

10 seconds.

A 10-kg brick and a 1-kg book are dropped in a vacuum on Earth. The force of gravity on the 10-kg brick is one-tenth as much. the same as the force on the 1-kg book. 10 times as much. zero.

10 times as much.

The force of gravity on the Moon is 1/6 as great as on the Earth. A man weighs 600 N on the Earth. His weight on the Moon would be 60 N 0 N 100 N. 600 N

100 N.

An object released from rest on another planet requires one second to fall a distance of 6 meters. What is the acceleration in meters per second per second due to gravity on this planet? 15 6 3 12

12

Twelve seconds after starting from rest, an object falling freely will have a speed of 100 m/s. 10 m/s. 120 m/s. 50 m/s

120 m/s.

If a ball falls from rest for 2.0 s In the Earth's gravitational field it will fall a distance how many meters? (Use g = 10 m/s^2 and assume no air resistance.) 2 m 5 m 20 m 10 m

20 m

An object at rest near the surface of a distant planet starts to fall freely. If the acceleration there is twice that of the Earth, its speed one second later would be 30 m/s. 10 m/s. 20 m/s 40 m/s.

20 m/s

If a ball falls from rest for 2.0 s In the Earth's gravitational field it will be moving at a speed of how many meters/second? (Use g = 10 m/s^2 and assume no air resistance.) 2 m/s 5 m/s 10 m/s 20 m/s

20 m/s

A ride on a roller-coaster car containing 6 passengers takes 3 minutes. Neglecting friction, a similar ride with 12 passengers aboard would take 1.5 minutes. 12 minutes. 3 minutes. 6 minutes.

3 minutes.

A man weighing 800 N stands at rest on two bathroom scales so that his weight is distributed evenly over both scales. The reading on each scale is 400 N 800 N 200 N

400 N

An object is pulled northward by a force of 10 N and at the same time another force of 15 N pulls it southward. The magnitude of the resultant force on the object is 150 N. 5 N. 0 N. 25 N.

5 N.

True or false, most objects in the universe are moving at constant velocity.

False

The key question that we are attempting to answer in physics is: When will the universe end? Where did the universe come from? How does the universe work? Why does the universe work as it does?

How does the universe work?

A car is traveling around a circular race track. Its speedometer reads a speed of 190 mph at all times. Which of the following is not true. Its velocity is constant Its speed is constant

Its velocity is constant.

Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much inertia volume. mass. all of these none of these

all of these (inertia, volume, and mass).

Compared to the mass of a certain object on Earth, the mass of the same object on the moon is zero. six times as much. one sixth as much. the same.

the same.

Two golf balls are released from the same height at the same time. Ball A is dropped straight down and ball B is thrown horizontally. Which ball will hit the ground first? (disregard air resistance) Ball A Ball B The will land at the same time.

they will land at the same time.

The force of gravity on the Moon is 1/6 as great as on the Earth. A man has a mass of 60 kg on the Earth. His mass on the Moon would be 10 kg 6 kg 0 kg. 60 kg

60 kg

An archer shoots an arrow. Consider the action force to be the bowstring against the arrow. The reaction to this force is the combined weight of the arrow and bowstring. air resistance against the bow. arrow's push against the bowstring. grip of the archer's hand on the bow. friction of the ground against the archer's feet.

arrow's push against the bowstring.

A truck is moving at constant velocity. Inside the storage compartment, a rock is dropped from the midpoint of the ceiling and strikes the floor below. The rock hits the floor behind the midpoint of the ceiling. More information is needed to solve this problem. ahead of the midpoint of the ceiling. exactly below the midpoint of the ceiling.

exactly below the midpoint of the ceiling.

Whirl a rock at the end of a string and it follows a circular path. If the string breaks, the tendency of the rock is to follow a straight-line path. increase its speed. continue to follow a circular path. revolve in a smaller circle.

follow a straight-line path.

A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction to this force is the air resistance on the ball. weight of the bat. weight of the ball. force that the ball exerts on the bat. grip of the player's hand against the ball.

force that the ball exerts on the bat.

A player catches a ball. Consider the action force to be the impact of the ball against the player's glove. The reaction to this force is the friction of the ground against the player's shoes. muscular effort in the player's arms. player's grip on the glove. force the glove exerts on the ball. none of these

force the glove exerts on the ball.

If an object's mass is decreasing while a constant net force is applied to the object, the acceleration decreases. remains the same. increases.

increases.

During each consecutive second of fall, the distance a freely falling object will fall is about 10 m. increasing. about 5 m none of these about 15 m.

increasing.

A falling mass reaches its terminal speed when the force of air resistance (drag) reaches 0. the force of air resistance equals the force of gravity . the force of gravity reaches 0.

the force of air resistance equals the force of gravity.

Your weight is a property of mechanical equilibrium. the gravitational attraction force between you and the Earth. equal to your mass. all of these

the gravitational attraction force between you and the Earth.

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that gravity tends to hold the milk carton secure. there is an action-reaction pair of forces. the milk carton has inertia. the milk carton has no acceleration.

the milk carton has inertia.

While an object near the Earth's surface is in free fall, its mass decreases. mass increases. velocity increases. acceleration increases.

velocity increases.

While an object near the earth's surface is in free fall, its mass increases. mass decreases. velocity increases. acceleration increases.

velocity increases.

A car maintains a constant velocity of 100 km/hr for 10 seconds. During this interval its acceleration is zero. 110 km/hr. 10 km/hr. 1000 km/hr.

zero.