Physics

Acceleration due to gravity is also called

Free Fall Acceleration

According to Newton's second law, when the same force is applied to two objects of different masses...

he object with greater mass will experience a smaller acceleration and the object with the less mass will experience a greater acceleration.

Which of the following is the cause of an acceleration or a change in an object's motion?

Force

Which of the following is the expression for average velocity?

vavg=(v1=v2)/2

A quarterback takes the ball from the line of scrimmage and runs backward for 1.0x10^1 m then sideways parallel to the line of scrimmage for 15m. The ball is thrown forward 5.0x10^1 m perpendicular to the line of scrimmage. The receiver is tackled immedia

43 m

A dolphin swims 1.85 km/h. How far has the dolphin traveled after 0.60 h

1.1 km

What is the formula for work?

W=Fd

Which of the following units are used to measure free fall?

m/s^2

The symbols for units of length in order from smallest to largest are:

mm,cm, m, and km

A stone is thrown at a angle of 30.0 above the horizontal from the top edge of a cliff with an initial speed of 12m/s. A stopwatch measures the stone's trajectory time from the top of the cliff to the bottom a 5.6 s. What is the height of the cliff?

120m

There are six books in a stack, and each book weighs 5N. The coefficient of friction between the books is 0.2. With what horizontal force must one push to start sliding on the top of five books off the bottom one.

5N

Which of the following is the best coordinate system to analyze a painter climbing a ladder at an angle of 60 degrees to the ground?

X-axis:horizontal to the ground;Y-axis: Up and Down

Which of the following is a value for the acceleration of objects in free fall?

-9.81 m/s^2

Which of the following is the expression for acceleration?

a=(v1-v2)(t1-t2)

What are we talking about when we say the road is 220 m long?

Magnitude

Which of the following is a quantity that has both magnitude and direction?

Vector

What is the term for the shortest distance from the beginning to the end path?

Resultant

A point from which one determine motion is

Frame of Reference

My pencil is 12 inches long is an example of what type of quantity?

Scalar

The Greek Letter delta indicates a

Difference of Change

Five darts strike near the center of a target. The dart thrower is

Both a&b ( accurate, precise)

Which of the following is an example of projectile motion?

A bullet being fired from a gun

Which of the following is the best coordinate system to analyze a car traveling northeast form one city to another?

Positive x axis pointing east; positive y axis pointing north

Which of the following is the motion of objects moving in two dimensions under the influence of gravity?

Projectile Motion

As a basketball player starts to jump for a rebound, the player begins to move upward faster and faster until his shoes leave the floor. At the moment the player begins to jump, the force of the floor on the shoes is...

Equal in magnitude and opposite in direction to the player's weight

Which of the following is a physical quantity that has a magnitude but no direction?

Scalar

The magnitude of the force of gravity acting on an object is...

Weight

Acceleration is...

The rate of change of velocity

Which statement about models is NOT correct?

Models help guide experimental design

A race car accelerates from 0m/s to 30 m/s with a displacement of 45m. What is the acceleration?

10 m/s ^2

A free-body diagram of a bail in free fall in the presence of air resistance would show

A downward arrow to represent the force of gravity and an upward arrow to represent the force of air resistance.

A soccer ball is kicked horizontally. WHat is its average speed if its displacement is 21 m after 4 sec.

5.25 m/s

Which of the following forces is an example of a contact force?

frictional force

The statement by Newton that for every action there is an equal but opposite reaction is which of this laws of motion?

Third

Which of the following is an example of a vector quantity?

Velocity

For the winter, a duck flies 10m/s due south against a gust of wind with a velocity of 2.5 m/s. What is the resultant velocity of the duck?

7.5 m/s south

The SI unit for time is

1 second

THe SI unit for mass is

Grams

THe SI unit for length is

Meters

The Si unit for volume is

Liters

A hammer drives a nail into a piece of wood. Identify an action-reaction pair, and compare the forces exerted by each object

THe hammer exerts a force on the nail; the nail exerts a force on the hammer

The nonzero net force is action on an object, the the object is definitely

being accelerated

The units for density are

grams/milliliter

A car goes forward along a level road at constant velocity. The additional force needed to bring the car into equilibrium is

Zero

When one initiates the movement of an object he has over come

static friction

IF a car is moving with constant velocity, then

The forces are both b&c (balanced, zero)

Which of the following is the tendency of an object to maintain its state of motion?

Inertia

Listening to your favorite radio station involves which area of physics

vibrations and wave phenomena

A 40 N crate is pulled up a 5m inclined plane at a constant velocity. If the plane is inclined at an angle of 37 then the net force is

Greater than the gravitational force

According to the scientific method, why does a physicist make observations and collect data?

To solve all problems

What is the speed of an object at rest?

0.0 m/s

THe values were obtained as the mass of a bar of metal. 8.83g, 8.84g, and 8,82g. THe known mass is 10.68g. THe values are

Precise

What is the percent error for number 55 above

17%

According to the scientific method, how does a physicist formulate and objectively test a hypothesis

By experiments

A rock is thrown straight upward with an initial velocity of 24.5 m/s where the downward acceleration due to gravity is 9.81 m/s^2.What is the rock's displacement after 1.00 m/s

19.6 m

Identify the following quantities as scalar of vector: the mass of an object, the number of leaves on a tree, wind velocity

scalar, scalar, vector

Which of the following statements does NOT describe force?

Force causes objects at rest to remain stationary

The most appropriate SI unit for measuring the length of an automobile is the

meter

What causes a moving object to change direction?

Force

The attractive force that acts between all objects is

Gravitational force

Newton's ___ law is how the unit is derived

2nd

An equation is wrong if both sides contain

different units of measure

THe slope of a position time graph is the ___ of an object

Acceleration

An object in rotational motion will

Exit in a straight line

For an object moving along a trajectory the horizontal velocity of the object ___ as the position changes

is constant