Forces
In Newton's 2nd Law, what is the formula for Force?
F = MA
Give two ways that a person can increase friction.
More weight
Rougher surface
What is the formula for momentum?
p=mv
Write the formula for Newton's 2nd Law
F=MA
What is the heaviest organ in the human body?
The Liver
Tension typically involves what type of material?
Rope, string, etc.
What is the best way to describe friction?
Force slows down or prevents motion between two touching surfaces.
A car has a mass of 800 kg and is moving at 17 m/s. What is its momentum? Be sure to include units.
13600 kg*m/s
Law of Inertia
What is the slowest moving mammal?
three toed sloth
Define the word force:
Push or pull that can cause an object to change its velocity.
What is the net force of an object if the applied force is 45N and the frictional force is 15N
30N
A baseball with a mass of 0.05 kg has a momentum of 1.7 kg*m/s. Find the velocity of the baseball.
34 m/s
Finish the phrase. For every action...
there is an equal and opposite reaction.
What is the capital of Portugal?
Lisbon
Give an example of normal force.
pencil on a table, chair on the ground, etc.
What is the ACCELERATION of a 20kg object if the applied force is 50N and the frictional force is 35N? Be sure to add in your units.
.75 m/s2
A hockey puck with a momentum of 5.04 kg*m/s is gliding across the ice at 30 m/s. What is the mass of the hockey puck? Be sure to round to 2 decimal places.
.17 kg
A driver slamming their brakes and the passenger continuing forward is an example of which of newton's laws?
1st Law
Which US state is home of Kodiak Bears?
Alaska
Show your work, or no credit will be given.
Which is a greater force: 300lbs or 1334 N.
1lb = 4.448N
300lbs = 1334.4N so 300lbs is greater
What is the ACCELERATION of a 15kg object if the applied force is 50N and the frictional force is 5N?
3 m/s2
A 80 kg person jumps off a 40 kg boat with a velocity of 4 m/s. What is the boat's velocity after it jumps? Use the formula m1v1+m2v2=0
-8 m/s
Which is a better example of Newton's 3rd Law?
A person jumps off a boat, and the boat moves in the opposite direction.
or
A car speeds up when the driver presses the gas pedal.
A person jumps off a boat, and the boat moves in the opposite direction.
Japan (Tokyo to be precise)