General (A)
General (B)
Net Force
F=M*A
Newton's Laws
100
A push or a pull that affects matter
Force
100
What is net force?
The sum of all forces acting on an object?
100
What is the total net force?
**problem on the board**
Daily Double
2N Left
100
A crate of 20 kg is accelerating at a rate of 2 m/s2. What is the net force on the crate?
40N
100
What does f=ma mean?
force = mass times acceleration
200
Speed and direction
Daily Double
Velocity
200
When forces act in the same direction, you can _____ the forces together.
add
200
Julie is standing on a platform. If she exerts 350 N of force on the platform, how much force does the platform exert back on Julie?
350 N
200
The force from a kick on the soccer ball is 20 N. The ball is 0.5 kg, what is its acceleration?
40 m/s2
200
"Whenever an object exerts a force on a second object, the second object exerts an equal force back onto the first object" describes which law?
Daily Double
3
300
The amount of force acting on a moving object can be measured by finding the objects mass and _________
Acceleration
300
What is an action force?
The force exerted by one object on another
300
Net force is...
193 N Right
300
What are the units we use for force, mass, and acceleration?
Force = Newton
Mass = g or kg
Acceleration = m/s2
300
This law explains why the Voyager spacecraft is still moving at 17 m/s, even though it was launched in 1977.
1
400
What is the force that occurs when 2 surfaces rub together?
Friction
400
__________ forces cause changes in motion.
Unbalanced
400
A force going to the right at 300 N, an opposite force going to the left at 500N, the net force, and direction are______.
200N Left
400
The monster truck is accelerating at 10 m/s2. The trucks net force is 50,000N. What is the mass of the truck?
5,000kg
400
Seatbelts protect you from the effects of which law?
1
500
When describing forces, we use the unit N. Who was this unit named for? What is he known for?
Isaac Newton. He discovered gravity and helped describe the laws of motion.
500
A force causes object to change what? List 2 things an unbalanced force can change?
Speed, direction, shape
500
Tyler and Owen are pushing the cabinet to the right. Tyler applies a force of 40 N and Owen exerts a force of 55 N. What is the net force?
Daily Double
95N Right
500
The dog accelerates at a rate of 16 m/s2. The net force of the dog is 320 N. What is the mass of the dog?
20kg
500
"A small car gets better gas mileage than a big car" is best explained by which law?
2