Forces
Motion Through Air
Calculations
Friction
Gravity
100
What is net force?
What is The sum of all forces acting on an object.
100
What are the two components of projectile motion?
What is horizontal and vertical velocity.
100
What is the formula for calculating weight?
What is W=mg
100
How does friction affect motion?
What is Opposes motion.
100
What is the acceleration due to gravity on Earth?
What is 9.8 m/s/s
200
What is the SI unit for force and instrument used to measure it?
What is Newtons and a spring scale.
200
Give an example of an object in truly in free fall.
What is an astronaut in a space shuttle falling toward a planet, something in a vacuum without air resistance.
200
What is the weight of a 38 kg object?
What is 372.4 N
200
How could you decrease friction?
What is Add lubricant, reduce mass, switch to rolling friction.
200
What is the difference between mass and weight?
What is mass is the amount of matter in an object, weight is the amount of gravitational force exerted on an object.
300
What is the difference between an unbalanced force and a balanced force?
What is Balanced forces result in no change in motion, and zero acceleration while unbalanced forces result in some change in motion, and therefore acceleration of deceleration and some net force.
300
How does mass affect the rate at which an object falls?
What is Mass has no effect on the rate at which an object falls.
300
What is the weight of a 700 g object?
What is 6.86 N
300
Air resistance is what type of friction?
What is Fluid friction.
300
How is an orbit formed?
What is combination of horizontal motion and free fall.
400
If the acceleration due to gravity were somehow doubled to 19.6 m/s/s, what would happen to your weight?
What is Your weight would increase.
400
Explain terminal velocity and draw a free body diagram for terminal velocity.
What is terminal velocity occurs when the upward force of air resistance balances the downward force of gravity, so that the object stops accelerating and falls downward at a constant velocity.
400
If an object was dropped from a building (neglecting air resistance), what would its velocity be after 2.5 seconds?
What is 24.5 m/s
400
What type of friction requires the most energy to overcome?
What is Static friction.
400
What two things affect gravitational attraction?
What is mass and distance.
500
What are three examples of field forces.
What is Gravitational, magnetic, electrical.
500
Describe the vertical motion of a football as it is punted. How does this compare to its horizontal velocity?
What is the horizontal motion is constant, while the vertical velocity is dependent on gravity. As it approaches the top of its trajectory, the velocity slows. After it reaches the top, it stops for an instant, and then accelerates downward due to gravity.
500
What is the mass of a 922 N object?
What is 94.08 kg
500
Draw a free body diagram for an object experiencing static friction.
What is (free body where applied and frictional force are balanced)
500
How would gravity change if you were to double the distance between two objects.
What is There would be ΒΌ of the gravitational force.
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