Motion
What is Frame of Reference?
What you choose to stay still in order to see an object move.
What is Gravity?
Gravity is a force of attraction between two objects due to their mass and distance between them.
What is inertia?
The Tendency to resist change in motion
What is Work?
The product of Force and Distance
When a force acts on an object in the direction the object moves.
A horse is pushing a human with a force of 97 N to the left. The horse is pushing on the human with a force of 33 N to the right. What is the net force of this interaction? What is the direction of the net force?
64N to the left
what is Instantaneous Speed?
THe rate of change in position at any given time
You are traveling in a car that is moving at a velocity of 20 m/s. Suddenly, a car 5 meters in front of you slams on its brakes. At that moment, you also slam on your brakes and slow to 5 m/s. Calculate the acceleration if it took 2 seconds to slow your car down.
-7.5m/s
What is net force?
The sum of the forces acting on a object.
What is Energy?
How long does it take to do 278 Joules of work with 17 watts of power?
16.3 seconds
What are the three ways an Object can accelerate?
A change in Speed, Direction, or Velocity (Both)
What is the Universal law of Gravitation constant?
6.67x10-11
What is the difference between mass and weight?
Mass is the amount of atoms or particles in an object.
Weight is how the force of gravity is acting on the mass
What is Power?
The rate of doing work.
How far can a mother push a 25 kg baby carriage, using a force of 73 N, if she can only do 2987 J of work?
40.92meters
What is the difference between a vector quantity and a scalar quantity?
A scalar quantity only has magnitude while a vector quantity has both direction and Magnitude.
If a BMW, with an initial velocity of 25 m/s, accelerates at a rate of 38 m/s/s for 4 seconds, what will its final velocity be?
117m/s
An elevator at a mall is taking some people from the first floor to the ground floor. Given the net force acting on the elevator is 6528 N and the net acceleration downwards is 3.01 m/s/s, what is the mass of the people and the elevator?
2168.77kg
If a suitcase has a mass of 25kg and it is moved from rest to the car at a distance of 18 meters in 40 seconds, how much power was used?
0.253 Watts
A cruise ship left a harbor and traveled to a small island off the coast of Hawaii at an average speed of 18 meters per second. The total time of the trip is 4 hours. How far was the island from the harbor?
259200meters
A child in an airport can cover 100 meters in 1.5 minutes running at a steady speed down a sidewalk. what is the speed of the child?
1.11m/s
What is Terminal Velocity?
The fastest velocity that will be reached by a falling object
How does air resistance impact the net acceleration of an object in free fall?
Air resistance decreases the rate of acceleration of an object.Due to air resistance, a falling object will no longer accelerate and reach its terminal velocity.
What are the 7 different types of energy?
1. Mechanical Energy - Potential and Kinetic
2. Sound (wave motion) Energy
3. Chemical Energy
4. Electrical Energy
5.Light Energy
6.Heat Energy
7. Nuclear Energy
The engine on a boat runs out of gas and the boat hits a dock with a force of 920 N. If the boat and its occupants had a mass of 1800 kg and it took 5 seconds for the crash to happen, how far did the boat travel before hitting the dock?
6.4 meters