Carmen is helping load furniture and boxes onto a moving truck. She picks up boxes of her things, places them on a cart, and pushes the cart to the moving van. What type of force Carmen is using?

Suppose a bulldozer is being hauled on the back of a flatbed truck at 50 km/h to a construction site. From which reference point would the bulldozer not appear to be moving?

Jerome has a tow truck, and he is in charge of moving several vehicles for the city. He wants to explain to his niece how towing vehicles relates to Newton’s second law. Which statement should he use?

Ahmed saw all of these things as he walked to school this morning. Which one is an example of a force pushing downward toward the ground?

Miko is blowing up balloons for her little sister’s birthday party. One of the balloons slips out of her hand before she ties it off, and it shoots through the air until it is empty. Which statement explains what caused the balloon to accelerate?

Mr. Wang works in a recycling center. Recyclable materials arrive at the center mixed together. Workers use magnets to separate steel cans from other items. Which two statements are true about the force between a steel can and a magnet?

Keisha has two large dogs and a small dog. The dogs like to play tug-the-rope together. Each of these three diagrams shows one way that the dogs play together with the rope. Look at each arrow and the number that goes with it. They show the direction and amount of force each dog exerts on the rope.

Look at the middle diagram, where the large dog and the small dog tug on the rope. Which statement correctly explains the amount and direction of the net force acting on the rope, and which direction the rope will move?

An astronaut in space might feel weightless, but there still is a gravitational attraction between the astronaut and Earth. Which two factors affect this gravitational attraction?

Pace left home at 8 am to spend the day at an amusement park. He arrived at the park, which was 150 km from his house, at 10 am. Pace explained that his speed was 38 km/h, which was a/an _____________ speed, but the fastest speed he went was 60 km/h.

Daphne is a pilot for a package delivery service. As her plane takes off and travels away from Earth’s surface, its gravitational potential energy increases. Which three factors affect the plane’s gravitational potential energy?

David delivers meals to elderly people once a week. He uses a cart to move the meals. The cart has four smooth wheels. Which type of friction acts between the cart wheels and the sidewalk?

For the forces on the two dogs in the middle diagram, are the forces balanced or unbalanced?

Pace left home at 8 am to spend the day at an amusement park. He arrived at the park, which was 150 km from his house, at 10 am. Pace explained that the fastest speed he went was 60 km/h, which was a/an ___________ speed

Carlos likes to bowl. He timed how long it took for his ball to travel the length of a an 18-m lane in the bowling alley. He plotted the final distance and time on a line graph. Carlos drew a line from this point to the origin of the graph.

How far down the lane was the ball after it had traveled for 2 s?

For the forces on the two dogs in the left diagram, are the forces balanced or unbalanced?

Miguel learned about the difference between mass and weight. He wanted to investigate what he would weigh at different locations in our solar system. He used this table to organize data he found out about Earth, the moon, Neptune, and Mercury. He needs to fill out the rest of the table.

How would Miguel's mass on Neptune compare to his mass on Earth?

A noncontact force needs to touch nothing for a force to be applied to another object.

_______________ is the force of gravity on a mass

For the forces on the two dogs in the right diagram, are the forces balanced or unbalanced?

A contact force needs to touch nothing for a force to be applied to another object.

One man pushes on the front of a cart while another man pushes on the back of the cart. The cart begins to move forward. Is the force balanced or unbalanced?

One man pushes on the front of a cart while another man pushes on the back of the cart. The cart begins to move forward. The net force on the cart is

A child is riding in a wagon. What reference point might have been used if an observer said that the child was not moving?

What three changes in motion show that an object is accelerating

A ball is pushed from a stop and rolls 6 m in 2s. Student A says the average speed of the ball is 3 m/s. Student B says the average speed of the ball is 1.5 m/s squared. Student C says the average speed of the ball is 3 m/s squared. Student D says the average speed of the ball is 1.5 m/s. Which student is correct

Mass is the force of gravity on a weight

The net force acting on an object equals the product of the object's mass and its acceleration. This is an explanation of which of Newton's Law's

A cross-country runner runs 4 km in 15 minutes. What can you calculate using this information?

A girl pushes in the classroom door to open it. Which two terms accurately describes the net force acting on the door?

A dog pulling on a leash while walking down the sidewalk. What frame of reference would indicate that the dog is not moving?

What word describes resistance to change in motion?

A woman is taking a walk, moving at a rate of 80 m/min. What additional information would you need to determine her velocity

Two satellites collide in space. If the first satellite had less mass, but the force of the collision was the same, then, for the second satellite, the collision would have

Two dogs pull on a rope. One dog pulls with a force of 5 N to the left, and the other dog pulls with a force of 3N to the right. What is the result?

The acceleration of a baseball after it is hit by a bat depends on the mass of the ball and the net force on the ball. This example best illustrates what law?

Which statement about acceleration is always true?

You can find the speed on a distance-versus-time graph by finding the ___________ of the line.

When is there static friction between your desk, chair, and the floor?

A soccer player kicks a ball. Which of the following describes the reaction force to this kick?

When two satellites collide in space the action-reaction forces during the collision are:

What is the relationship between the kinetic energy of an object and the mass of an object? Assume the speed is constant.

Two satellites collide in space. Each satellite has a different mass. The collision caused one satellite to change directions. Was the force applied by the first satellite balance for unbalanced during the collision?

Space X Dragon capsule is about ready to dock with the International Space Station (ISS). They are both travelling at 28,163 kph 400 km above the Earth's surface. and are about 1.2 km away from each other. The mass of the ISS is 419,709 kg and the mass of Dragon is 12,055 kg. What gravitational attraction do you think is stronger?