Law of Gravitation
Mass vs Weight
Types of Forces
Calculations
More Calculations
100
State the relationship between the gravitational force and mass in the law of gravitation.
F_g = (G*m_1 *m_2)/d^2
What is the gravitational force and mass have a directly proportional relationship?
100
State the units we use to measure mass.
What is kilograms [kg]?
100
Define friction force.
What is the force exerted by the surface as an object moves across it?
100
A 70 kg jogger is running at a constant acceleration of 2 m/s/s east. Find the net force.
What is 140 N east?
100
A 900 kg elevator is suspended by a cable and is accelerating 2 m/s/s upward. Calculate the weight of the elevator.
What is 8,820 N downward?
200
F_g = (G*m_1 *m_2)/d^2
State how the gravitational force would be affected in trial 2, when the mass changes.
What is the gravitational force is increased by a factor of 2?
200
State the units we use to measure weight.
What is Newtons [N]?
200
Define air resistance.
What is a special type of friction force that acts on an object traveling in air?
200
A 900 kg elevator is suspended by a cable and is accelerating 2 m/s/s upward. Calculate the tension force of the cable.
What is 10,620 N up?
200
A 900 kg elevator is suspended by a cable and is accelerating 2 m/s/s upward. Calculate the net force.
What is 1,800 N up?
300
State the relationship between the gravitational force and distance between the centers.
F_g = (G*m_1 *m_2)/d^2
What is the gravitational force and distance have an inversely squared relationship?
300
What is the relationship between the mass and weight?
F_g = m*g
What is the mass and weight are directly proportional?
300
Define applied force.
What is a push or pull applied to another object?
300
A net force of 15 N is exerted on an encyclopedia to cause it to accelerate at a rate of 5 m/s/s. Determine the mass of the encyclopedia.
What is 3 kg?
300
Determine the acceleration of the object. 
What is 10 m/s/s left?
400
State how the gravitational force is affected in trial 2, when the distance is changed.
F_g = (G*m_1 *m_2)/d^2
What is the gravitational force is decreased by a factor of 4?
400
You travel to an unknown planet that is 12 times the distance from Earth and has a gravitational field strength 3.5 times greater than Earth. State how your mass will be affected.
What is the mass will not be affected, it will remain the same?
400
Define tension force.
What is a force that is transmitted through a rope, cable, or wire?
400
Natalia's has a mass of 76 kg. Find her weight on the moon where the acceleration due to gravity is 1.62 m/s/s.
What is 123.12 N downward?
400
A 5.0 kg box stays on a frictionless horizontal surface. Bob then starts pulling the box with a force of 100 N at an angle above the horizontal and the vertical component is 44 N. Determine the normal force of the box.
What is the normal force is 5 N upward?
500
Rank the gravitational forces from least to greatest.
F_g = (G*m_1 *m_2)/d^2
What is trial 3 < trial 2 < trial 1 ?
500
You travel to an unknown planet that has a gravitational field strength 3.5 times greater than Earth. State how your weight will be affected.
What is the weight will increase by a factor of 3.5?
500
Define normal force.
What is the support force exerted perpendicular to the surface that it comes in contact with?
500
Two students are sitting 1.50 m apart. One student has a mass of 70.0 kg and the other has a mass of 52.0 kg. Determine the gravitational force between them in scientific notation.
What is 1.08 x 10^-7 N?
500
A 5.0 kg box stays on a frictionless horizontal surface. Bob then starts pulling the box with a force of 100 N at an angle right and above the horizontal. The vertical component is 44 N. Determine the horizontal component of the box.
What is 89.8 N right?