Kinematics
Dynamics
Circular Motion
Gravity
100
This is the term for an object changing it position over time.
What is velocity?
100
An object of mass, M, and a separate object that is half its mass, 0.5M, are dropped from the same height, h. This is the object that will hit the ground first.
What is neither?
100
As you go through a dip in the road, describe your apparent weight.
It will feel like less than mg?
100
This is the point of Earth where the force of gravity is the strongest.
What is the surface?
200
This is the term for an increase or decrease in the overall velocity of an object over time.
What is acceleration?
200
This is the net force and acceleration on an object traveling with constant velocity.
What is zero?
200
This is the term for the time it takes an object to complete one rotation around a circular path.
What is period?
200
Thinking Question: Why does the moon not fall into the Earth if there is a gravitational pull between the two?
It is moving too fast?
300
When an object travels 15 meters north, 30 meters south and then 10 meter north again, a result of 5 meters south would be this type of measurement.
What is displacement?
300
A 5.9 kg bike moves with a constant acceleration of 4.0 m/s2. Determine the net applied force responsible for the acceleration.
What is 23.6 N?
300
DAILY TRIPLE: For the gif below explain the direction of the centripetal force, acceleration, and the velocity of the car the top of the circle.
What is force and acceleration down or towards center and velocity tangent or to the left?
300
If I decrease the distance between two objects, this is the resulting change on the gravitational force between the two objects.
What is it increases?
400
CLASS QUESTION: In 30 seconds, write down as many vector quantities as you can. The group with the most correct answer gets the points. If we have a tie, each group will receive points.
What are:
-Velocity
-Displacement
-Acceleration
etc.
400
A bus travels at constant acceleration of 3.7 m/s2. Find the mass of the bus if an 8150 N net force is required to produce this acceleration.
What is 2200 kg?
400
If the frequency of an object’s motion is tripled, the period of its motion will be
What is one-third its original or cut in a third?
400
If I increased the size of an object, this is the resulting change on the gravitational force of the object.
What is it increases?
500
DAILY DOUBLE: Given the velocity vs. time graph. Calculate the acceleration (in m/s2) and the distance traveled (in m) in the first two seconds.
What is 4 m/s2 and 8 meters?
500
A man is 50 kg on Earth and hops on a space shuttle to travel to the moon where the force of gravity is 1.6 m/s2. This is the weight of the man on the Earth.
What is 490 Newtons?
500
An object travels in a circular path of radius r at a constant speed v. What happens to the object’s acceleration if the radius of the circle is tripled and the speed stays unchanged?
What is it is cut in a ninth or 1/9th?
500
What happens to the gravitational field if the mass of a planet doubles?
What is it doubles?
600
When an object is traveling up from the ground and back down, this is the variable that is always negative.
What is acceleration, g or gravity?
600
A 200 N car and a 800 N car collide. Both shatter their bumpers and their drivers experience whiplash. If the force of gravity is 9.8 m/s2 and the coefficient of kinetic friction between both cars and the ground was 0.2, what is true about the force both cars experience?
What is they are equal?
600
A car goes around a curve of radius r at a constant speed v. Then it goes around the same curve at twice its original speed. What is the centripetal force on the car as it goes around the curve for the second time, compared to the first time?
What is it is four times bigger or quadruples?
600
Determine the surface gravity of Earth. Its mass is 6.0x1024 kg and its radius is 6.4x106 m.
What is 9.8 m/s2?
700
An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff.
What is 1720 m?
700
Class Question: Draw a force diagram for the situation below for the forces acting on the man.
A man steps in an elevator and steps on a scale inside the elevator. His weight reads 150 pounds. After a few seconds in the elevator, his weight reads 130 pounds.
What is FN going up and mg going down. FN must be shorter than mg.
700
A pilot executes a vertical dive then follows a semi-circular arc until it is going straight up. Just as the plane is at its highest point (at the top of the circle), the pilot’s apparent weight will be
What is less than mg?
700
Compute the surface gravity, g, for the surface of Mercury. Its radius is 5.2 x 106 m and its mass is 6.6 x 1023 kg.
What is 1.6 m/s2?
800
Upton Chuck is riding the Giant Drop at Great America. If Upton free falls for 2.60 seconds, what will be his final velocity and how far will he fall?
What is 33.1 m and 25.5 m/s?
800
A desk is being pushed. Initially it is hard to move, but once it is finally moving, it is easier to maintain its speed. Explain this in terms of the two types of friction.
What is static friction is stronger than kinetic friction?
800
DAILY DOUBLE: A 1600 kg mass is spun in a circle of radius 90 m with a velocity of 300 m/s. What is the frequency if the mass spins with a period of 0.63 s? What is its acceleration? What is the centripetal force acting on it?
What is:
f= 1.6 Hz
a= 1000 m/s2
F= 1.6 x 106 N
800
What is the magnitude of the gravitational force acting on a 12.0 kg object which is 2.0 m from a 2.0 kg object?
What is 4 x 10-10 N?