Vocab
What term describes the force acting against an object as it slides along the floor?
Friction
m/s
Velocity
If I travel 6km West, 12 km North, and 6 km East, what is my distance and my displacement? (Provide 2 answers, all or nothing)
Distance = 24km
Displacement = 12km
What is Earth's gravitational constant?
What is the difference between speed and velocity?
Velocity has a direction, speed doesn't. (i.e. Velocity is a vector, speed is not)
What is the tendency of an object to resist a change in motion? (part of Newton's First Law of Motion)
Inertia
m/s2
acceleration
I run 1km in 4minutes. What is my average speed in m/s?
4.167 m/s
A parked car with mass 2000kg is hit by another car, providing an acceleration of 8.9 m/s2. What is the force acting on the parked car?
17,800 N
From which of Newton's laws do derive the formula for Net Force? (F = m*a)
Newton's Second Law
What is the name for the type of velocity in which the force of air resistance equals the force of gravity? (a.k.a the maximum attainable speed in a free fall)
Terminal velocity
N (Newton)
Net Force OR weight
If I travel 100 meters in 13 seconds, what is my average speed over that interval?
7.69 m/s
If I exert 20N of force on a box with a mass of 2kg, what is the acceleration of the box?
10 m/s2
Which of Newton's Laws states that when an object exerts a force on another object, the second object exerts an equal and opposite force on the first object?
Newton's Third Law of Motion
What is the name for the acceleration at a specific point in time, NOT over an interval?
Instantaneous acceleration (NOT average acceleration)
SI unit for mass
kilogram (kg)
A bullet with a mass of 0.1 kg is traveling at a velocity of 8000m/s. A car with a mass of 2500 kg is traveling at a velocity of 3 m/s. Which object has a greater momentum?
The car has greater momentum.
A car with a mass of 876 kg is traveling at a velocity of 30 m/s. What is the car’s momentum?
26,280 kg*m/s
If a penny is dropped into a free fall from the top of the Eiffel Tower (330 m.) and hits the ground after 20 seconds, what is the average speed?
16.5 m/s
What term refers to a system of objects not moving with respect to one another?
Frame of Reference
kg*m/s
Momentum (formula: p = m*v)
Initially at rest, I accelerate my car up to a speed of 25 m/s in 7 seconds. What is my average acceleration?
3.57 m/s2
A sailboat is traveling at 20 km/hr Northwest. Suddenly, there is a gust of wind blowing against the direction of the sailboat at 8km/hr Southeast. What is the new velocity of the sailboat?
12 km/hr Northwest
A baseball is hit into the outfield. As soon as it is hit, it is moving at an instantaneous velocity of 53 m/s. After 22 seconds, it is caught by the outfielder. Right before it is caught by the outfielder, it is moving at an instantaneous velocity of 26m/s. What is the average acceleration over the interval?
-1.23 m/s2