Physics Summative Review

Luis is using a rope to lift a 3.0 kg box up at an acceleration of 4 m/s^2 .

What is the upwards force of the rope on the box?

• 12N

• 42N

• 4N

• 30N

The graph shows the position of a dog moving over time.

During which time interval, if ever, is the dog accelerating?

• 0-1s

• 1-2s

• 2-3

• 3-4

Kaleb is planning to conduct a lab to investigate the forces on a cart. He plans to increase the mass of the cart in each trial and measure the acceleration while keeping the force the same. Which of the following correctly identifies the independent variable in this lab?

• acceleration

• force

• mass

• net force

The graph shows the acceleration of the cheetah over time. What is the change of velocity of the cheetah from 3 to 8s?

Mathematical Equivalence

OFF

Answer explanation

Solve for the area.

Emmanuel is walking down the aisle. Akilles pushes Emmanuel downwards with a force. If the net force is not zero, which of the following must be true?

• The velocity of Emmanuel increases.

• The velocity of Emmanuel decreases.

• Emmanuel will accelerate.

• Emmanuel will move at a constant velocity.

Answer explanation

A satellite is built at the surface of the Earth, it experiences a force of gravity of 75 N. The satellite is then sent to another space, which has 0.7 of the mass of the Earth and 3 times the acceleration due to gravity of Earth. What is the new force of gravity on the satellite?

• 157.5N

• 52.5N

• 0.21N

• 2.1N

Jayla climbs on top of the building with a vertical distance of 15.0 meters in 45 seconds. What is the average velocity of Jayla as she climbs the building?

• 675m/s

• 675m

• 0.33m

• 0.33m/s

Martin serves a tennis ball at a velocity of 25 m/s. If the tennis ball has a mass of 0.03 kg, what is the kinetic energy of the tennis ball in J?

• 9.375J

• 0.75J

• 0.375J

• 0.75m/s^2

A car moves from x1 = 10 m to x2 = -40 m. The displacement of this car from its original position is...

• 50m

• 30m

• -30m

• -50m

Michelle is trying to see how high she can throw a ball and throws it straight up into the air. At its highest point, what is the magnitude of the acceleration of the ball?

• 9.8m/s^2

• Greater than 9.8m/s^2

• Less than 9.8m/s^2

• 0 m/s^2