Isaac Newton
How many laws does Isaac Newron have?
3
What is the correct unit for force?
*provide both options
N or kgm/s^2
What units do we use for mass and acceleration?
kg and m/s^2
momentum
Solve: Ball 1 is rolling 11 m/s directly toward a 0.5 kg ball 2 at rest. During the collision, ball 1 stops and ball 2 is launched forward at 10 m/s. What is the mass of ball 1?
0.45 kg
What is Newton's first law?
Law of Inertia
Object in motion stays in motion; object at rest stays at rest until acted upon
What formula do we use to solve for force?
F= m x a
Rearrange the equation to solve for acceleration:
F= m x a
a = F / m
What equation do we use to solve for momentum and what unit goes with momentum?
p = m x v
kgm/s
Solve: Calculate the momentum of a 90 kg cyclist moving at a rate of 7 meters per second.
630 kgm/s
What is Newton's second law?
F=ma
Isaac Newton
Solve: Given a force of 380N and an acceleration of 2.5 m/s^2, what is the mass?
152 kg
What equation do we use for collisions or the law of conservation?
m1 x v1 = m2 x v2
Solve: A 99kg running back is moving down the field with a velocity of 9.4m/s. What velocity must the 84kg run at in order to stop the running back?
11.07 m/s
What is Isaac Newton's third law?
every action has an equal and opposite reaction
Doubling the force, _______________ the acceleration
Doubles
Solve: How much force is needed to accelerate an 80 kg mass at 4 m/s^2
320 N
higher mass or higher velocity = _____________ momentum
greater
Solve: Your sister weighs about 52kg and has a 9kg hiking pack on. What is the combined momentum of her and the pack if they are hiking at around 1.7m/s?
103.7 kgm/s
Pick one of Newton's laws and provide an example of that law
answers will vary
Which of Newton's laws explains why rockets leave the ground?
Solve: What is the acceleration of a 3000 kg object pushed by a 10,500 N force?
3.5 m/s^2
Provide an example of the law of conservation/collision
answers will vary (car crash, pool balls, etc.)
Solve: A tennis ball is hit with a velocity of 22m/s. What is its momentum if its mass is 0.056kg?
1.232 kgm/s