Motion & Energy
Who developed the 3 laws of Motion (full name)
Isaac Newton
When forces are being applied in the same direction, you have to __________ them to find the net force.
add
If an object is moving at 10m/s and has a mass of 10kg, how much force is it applying? (include units and round to 10ths place)
100N
What is the difference between speed and velocity?
Speed states how fast your going in a given amount of time and velocity is speed and direction
An object has a mass of 3 kg and was pushed with a force of 18N. What is the object's acceleration? (include units and round to 10ths place)
6kg/s^2
What are two types of energy that are present in a moving object?
Potential, Kinetic, Thermal
State to vertical forces and two horizontal forces.
Horizontal- applied and friction force
Vertical: gravity and normal force
An object applies 30 N of force when it accelerates at 4m/s^2. What is this object's mass? (include units and round to 10ths place)
7.5kg
A graph outlines time on the X axis and distance on the Y axis. If the slope stays the same over time, what does that tell you about speed.
Speed is steady/constant
A 50kg car traveled 5m at a constant speed. The trip took 30seconds. What was its acceleration? (Include units and round to the 10ths place)
What is energy
ability to do work
A force of 10N is pulling an object left, while another force is pulling an object right by 11N. What is the net force of the object? (Include force and direction)
1N right
A 5kg object fell from the sky. How much force is the object applying onto Earth? (include units and round to 10ths place)
49N
A car travels 7 miles in 2 seconds. How fast is the car moving? (include units and round to 10ths place)
3.5 mi/s
What is the acceleration of an object with a force of 50N and a mass of 20kg? (include units and round to 10ths place)
2.5m/s^2
How is the law about mass and law about energy similar?
both cannot be created or destroyed
An 1kg object is falling, with no air resistance present. What is the net vertical force? (Include units and direction. Round to 10ths place)
9.8N down
If a 40kg skeleton is resting on a table, how much normal force is being exerted on it? (include units and round to 10ths place)
392N
A ball rolled at a speed of 40in/s and traveled for 60 seconds. How far did the ball roll? (include units and round to 10ths place)
2,400 inches
A cat goes from 10m/s to 30m/s in 5 seconds. What is the cat's acceleration during that time? (include units and round to 10ths place)
4m/s^2
State what Newton's 3 laws of motion state.
1- Law of inertia
2- F=ma
3- Forces work in opposite directions and in pairs
A glass sphere is falling from a skyscraper. The sphere has a mass of 10kg. If the air resistance is 30N, what is the net force of the object? (include units, direction, and round to 10ths place)
68N down
An object of mass 10 kg is falling in air and experiences a force due to air resistance (going against gravity) of 20 newtons. How much net force does the object apply to Earth? (Include units and round to the 10ths place)
78N
Ralph left the house at 8am. He travels at 4mi/hr. Assuming he continues to travel at this rate, what time will he arrive at his friends house, who lives 10 miles away?
10:30am
An object of mass 10 kg is falling in air and experiences a force due to air resistance (going against gravity) of 20 newtons. What is the acceleration of the object? (Include units and round to the 10ths place)
7.8m/s^2