Free Printable STAAR Category 2 Physics JH

Worksheets

STAAR Category 2 Physics JH

Total questions: 22

Worksheet time: 27mins

Name

Class

Date

Safety belts protect people in cars in the event of an accident because, according to Newton’s Laws of Motion, when an impact causes the car to suddenly change its motion, -

the people in the car will continue to move in the same direction and at the same speed as before the impact.

the speed of the car always increases, giving it greater force since the mass will remain the same.

the speed of the people always increases, since now they have, not one, but two forces acting on them.

the car now has a greater overall mass - its own mass plus the mass of the object by which it has been struck.

During a demonstration of Newton’s laws of motion, a student used the setup shown in Figure 1. The student flicked the index card with a fingertip, and the coin fell straight down into a plastic cup as shown in Figure 2. Which of these best explains why the coin fell straight down into the cup instead of remaining on the index card?

The coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.

Moving the card applied an action force on the coin. Since the card was gone, gravity applied a reaction force on the coin.

The card had less mass than the coin, so a smaller force of gravity acted on the card. The larger force of gravity on the coin made it fall.

The acceleration of the coin falling into the cup was equal and opposite to the acceleration of the card.

According to Newton’s Law of Inertia, an object that is moving will change its motion only if what kinds of forces act on it?

Constant forces

Unbalanced forces

Unbalanced forcesStrong forces

Gravitational forces

The masses of four vehicles and the net forces acting on them as they enter a highway are recorded in the table below. Which vehicle has the greatest acceleration as it enters the highway?

USE THE FORMULA F=ma

Sedan

Coupe

SUV

Truck

Two students are working together to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it across the table to Student 2. If the force of friction resisting the student's push is 4 N, what is the TOTAL net force acting on the board?

4 N

6 N

10 N

14 N

The masses of four objects are given in this table. If all of the objects have the same acceleration, which will require the greatest force? Object # only

(a)

A 20 kg bike accelerates at 10 m/s². What was the net force?

USE THE FORMULA F=ma

Be sure to include units

(a)

According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backwards because -

the mass of the skateboard is the same as the mass of the person jumping off.

the pull of gravity on the person is the same as on the skateboard, regardless of size.

the air resistance on the person is great and the friction on the skateboard is small.

for the force that sent the person forward, there is an equal force pushing back on the skateboard.

When a car goes around a corner at 20 mph, why do we say it accelerates?

The car is accelerating because of the velocity is constant

The car accelerates because it's going 20 mph

Cars always accelerate when they are in motion

The car is accelerating because it's changing direction

10.

The graph shows the distance a car traveled in 5 seconds while moving on a freeway. What is the average speed of the car? USE THE FORMULA Speed = distance/time

28 m/s

145 m/s

700 m/s

2.7 m/s

11.

A person is running at a constant speed and takes a 10 minute break. Which graph best represents the student's motion?

12.

Monarch butterflies fly 12 mph south as they migrate.

Speed

Velocity

Acceleration

13.

Which beach balls have potential energy but not kinetic energy?

Beach balls 1 and 3

Beach balls 2 and 4

Beach balls 1, 2 and 4

Beach balls 2, 3 and 4

14.

A marble is given potential energy by being placed at Location W. When the marble is released, it rolls down the track. At which location does the marble have maximum kinetic energy?

Location W

Location X

Location Y

Location Z

15.

The diagram below shows a hot air balloon rising. Propane gas tanks are seen at the bottom of the balloon. What energy transformations occur when the propane gas is used to lift the balloon?

Mechanical----> Light----> Chemical

Chemical----> Mechanical----> Thermal

Thermal----> Chemical----> Light

Chemical----> Thermal----> Mechanical

16.

When a battery is used to light a flashlight, like the one pictured below, what energy transformation occurs?

Thermal ➡ Electrical

Chemical ➡ Light

Light ➡ Thermal

Sound ➡ Light

17.

If the car in the diagram rolls faster and faster as it moves down the ramp, you can be sure that

there is no friction acting on the object.

the forces acting on it are unbalanced.

the net force on the car is 0 N.

only gravity is acting on the car.

18.

Which one of Newton’s Laws of Motion best explains why the dishes do not move when the tablecloth is removed?

Newton's 1st Law

Newton's 2nd Law

Newton's 3rd Law

19.

Which of Newton's laws are illustrated with a rocket launch?

1st Law, the Law of Inertia.

2nd Law, the Law of Acceleration.

3rd Law, the Law of Action - Reaction

20.

What law of motion does this picture represent?

Newtons 1st law

Newtons 4th law

Newtons 3rd law

Newtons 2nd law

21.

A sports car speeds up much faster than a dump truck when a traffic light turns from red to green. Which law is this?

Law 1

Law 2

Law 3

22.

When a mule stops suddenly, the packages on its back continue to move forward onto the ground. Which law is this?