F=ma Calculations
A 5 kg object accelerates at 2 m/s2 when a force is applied to it. What is the force?
10 N
The scientific term that describes an object's tendency to resist change in motion.
inertia
When a hammer hits a nail with a force of 70 N, what force does the nail hit the hammer with?
70 N
What happens when the net force acting on an object is zero?
The object will not accelerate
Which law would we use to understand how mass affects force?
2nd Law
When a 200 kg object is hit with a force of 50 N, what is the resulting acceleration?
0.25 m/s2
The scientific term for when the forces acting on an object do not all cancel each other out
unbalanced force
When Patricia hits a whiffle ball with a bat, why doesn't the force of the bat hitting the ball and the force of the ball hitting the bat cancel each other out?
Because the ball and the bat/Patricia are separate systems with different masses.
Scientific term for a push or pull
force
What causes a change in motion?
An unbalanced force
If an object accelerates at 55 m/s2 when struck with a force of 11 N, what is its mass?
0.2 m/s2
The object accelerates
Complete the sentence:
For every action force there is...
...an equal and opposite reaction force
What are the units used in a calculation for Newton's second law?
Kilograms, Newton's, meters per second squared
The force that opposes motion?
friction
In a frictionless environment, Joel tries to push a refrigerator with a mass of 120 kg. How much force must he apply to accelerate the fridge 0.15 m/s2?
18 N
You are riding in a car that suddenly hits the brakes, and your body lurches forward against the seatbelt. This happens because:
Newton's 1st Law
Your inertia keeps your body moving forward at the car's original speed.
While walking, a person is propelled forward by what force?
The reaction force of the ground pushing the feet/leg/person
What are the action/reaction forces when someone uses a canoe?
Paddle pushes the water backward, water pushes the paddle forward.
How many kilograms are in 2500 grams
2.5 kg
If Jackson pushes a 5 kg bowling ball and a 0.1 kg tennis ball with the exact same amount of force, which one will accelerate faster?
A book rests undisturbed on a desktop. Which of Newton's laws explains why the book does not move on its own?
Newton's 1st Law
A swimmer pushes backward against the water with their hands, and their body moves forward through the pool. Which Newton's Law is this?
Newton's 3rd Law
How much net force is required to accelerate a 4 kg skateboard at a rate of 5 m/s (squared)
20N
A baseball bat strikes a ball, pushing the ball forward.
Newton's 3rd Law