Review for Unit 7.P.1 Forces and Motion

Review for Unit 7.P.1 Forces and Motion

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Multiple Choice

While playing soccer with her school soccer team, Tytiana kicked the ball down the hill beside the soccer field. Which of the following best explains why the soccer ball continues rolling down the hill?

• The ball will stay in motion until an unbalanced force acts upon it.

• The ball will stay in motion until the force of gravity pushing down on the ball is greater than the momentum of the moving ball.

• The ball will stay in motion if the velocity of the ball is constant

• The ball will stay in motion until a balanced force acts upon it.

Multiple Choice

Which of the following could be used to determine if an object is in motion?

• The position changes relative to a reference point.

• The reference point changes as the position of the object changes.

• The reference point changes as the object remains stationary.

• The motion of the object is in a positive direction and the motion of the reference point is in a negative direction.

Multiple Choice

The graph shows the position (distance from home) of a bicycle rider on a 42-minute trip. Letters A through E are time intervals during the trip. The key defines the length of each interval. Which of the following best explains how the graph shows that the rider stopped during time interval D?

• Interval D shows that the bicycle rider has stopped because the time the bicycle rider was from home did not change.

• Interval D shows that the bicycle rider has stopped because the interval line shows constant motion.

• Interval D shows that the bicycle rider has stopped because the distance the bicycle rider was from home did not change.

• Interval D shows that the bicycle rider has stopped because the interval line is a straight line.

Multiple Choice

Billy is skateboarding on a steep hill. Which of the following locations will friction act upon Billy while he is skateboarding?

• Friction will act on Billy's skateboard at location 2 and location 4.

• Friction will act on Billy's skateboard at location 1 and location 4.

• Friction will act on Billy's skateboard at location 3 and location 4.

• Friction will act on Billy's skateboard at all locations.

Multiple Choice

Newtons laws of motion describe a relationship between which of the following?

• the relationship between the force of gravity pulling up on an object and the weight of the object.

• the relationship between the momentum of the moving object and the amount of friction on the object.

• the relationship between the volume, density and mass of the object.

• the relationship between gravitational force, mass and distance

Multiple Choice

Which of the following has the greatest impact on friction?

• the velocity of the stationary object

• the volume of the object

• the force of gravity moving the object

• the roughness of the surface

Multiple Choice

Jimmy is a sprinter on the middle school track team. The coach asked him to run five 40-meter sprints during practice. The graph shows Jimmy’s movement during his first 40-meter sprint. Which of the following statements best explains Jimmy’s movement during his first 40-meter sprint?

• Jimmy ran the first meter in 20 seconds. He ran the second 20 meters at a rate of 10 meters per second.

• Jimmy traveled ten meters per second when he started, he stopped briefly and then ran the last 30 meters at the same rate he ran the first 10 meters.

• Jimmy ran the first 10 meters at a rate of 1 meter per second. The last 30 meters her ran at 20 meters per second.

• Jimmy ran the first 20 meters at a rate of 10 meters per second. He ran the last 20 meters at a rate of 10 meters per second.

Multiple Choice

Between which two point is the speed the fastest?

• AB

• BC

• CD

• DE

Multiple Choice

Which of the following situations could be represented by this graph?

• A student walks 1.5 km to a friend’s house in 20 minutes. The two students then walk another 1.5 km to school in 40 minutes.

• A student walks 1.5 km to a friend’s house in 30 minutes. The two students then walk another 1.5 km to school in 30 minutes.

• A student walks 1.5 km to a friend’s house in 20 minutes. The two students then walk another 1.5 km to school in 60 minutes.

• A student walks 1.5 km to a friend’s house in 40 minutes. The two students then walk another 1.5 km to school in 20 minutes

Multiple Choice

Reference points can be used to describe an object in motion. Which of the following is an example of a reference point most often used to indicate motion?

• south-north

• sideways and backwards

• positive and negative

• north, south, east, west

Multiple Choice

A student made a track for a toy sled using four different materials. At which section of track is friction most likely to cause the greatest resistance on the motion of the toy sled?

• Section 1

• Section 2

• Section 3

• Section 4

Multiple Choice

Which of the following would present the greatest opposition to motion?

• momentum

• gravity

• friction

• balanced forces

Multiple Choice

The diagram represents a person pulling a cart with a box on it. The arrow represents the direction in which the person is moving. Which of the following best explains why the box may continue to move forward if the cart suddenly stops moving?

• Gravity will continue to move the box if the cart suddenly stops moving

• Objects in motion will remain in motion in the same direction until acted on by a force.

• Friction will continue to move the box if the cart suddenly stops moving.

• Objects in motion will remain in motion until the force acting on it decreases

Multiple Choice

The car is traveling down the hill when the driver realizes his brakes are not working. Which of the following will most likely stop the car if the driver loses control of the car and it continues speeding up?

• The force of gravity pulling down on the car will stop the car.

• The car will hit an object that acts as an unbalanced force that stops the car.

• The momentum of the car will increase and eventually stop its forward motion.

• The weight of the car will slow the motion of the car as it travels down the hill

Multiple Choice

What is the difference between mass and weight?

• mass is how much matter is in an object, and weight is the gravitational pull on that object

• mass and weight are the same

• weight affects how much mass is in an object

• weight is determined by how many atoms make up an object

Multiple Choice

For an investigation, a Marco measures the speed of a cart as it rolls down a ramp at different locations. Marco then records data in the table below. Which of the following best explains the Marco’s data?

• The speed of the cart decreases as the cart rolls down the ramp because of friction between the cart and the ramp.

• The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced

• The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are balanced.

• The speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.

Multiple Choice

In which of the following sections of track will the sled experience an unbalenced force?

• Sections 1 and 3

• Sections 2 and 3

• Sections 3 and 4

• Sections 2 and 4

Multiple Choice

Which of the graphs shows that one of runners started 10 yards further ahead of the other?

Multiple Choice

At what speed was object A moving?

• 1 km/hr

• 2 km/hr

• 10 km/hr

• 20 km/hr

Multiple Choice

This morning, Jason’s school bus ran out of gas half-way through the bus route. They had to wait for someone to bring gasoline before the bus drive could continue her route. In science class, Jason’s teacher, Ms. Amos, asked her students to create a graph showing the bus when it was in a stationary position? Which student(s) have created a graph reflecting the correct data?

• Joe, Ty and Gwen have created graphs showing the bus in a stationary position.

• Eli and Jose have created graphs showing the bus in a stationary position.

• Joe has created a graph showing the bus in a stationary position.

• Gwen has created a graph showing the bus in a stationary position.

Multiple Choice

A bowling ball was released, and the distance it rolled was measured at the end of 5, 10, and 15 seconds. The data table below shows the data recorded from the experiment. Which of the following graphs illustrates the correct graphical representation of the collected data from Data Table 1?