Motion
Force
Work and Power
Speed and Velocity
Acceleration and Gravity
100
What do the units for acceleration mean?
They mean the object is going however many meters in however many seconds
100
What is net force?
The sum of all forces acting on an object
100
What is work?
the product of an external force acting on an object and the displacement the force has caused
100
What is the formula for Velocity?
V=d/t
100
Acceleration definition
Increase in the rate or speed of an object
200
What are three ways an object can accelerate?
Change in speed, direction, or speed and direction
200
What is the mass of a 414 lb person?
188.18 kg
200
How much work is done by Tess who pushes a box 5 meters with a force of 12 Newtons forward?
60 J
200
Define speed
The rate of change
200
What is gravity?
The force that pulls objects with mass towards each other
300
What is acceleration?
The rate at which velocity changes with time, in terms of both speed and direction
300
What is gravity?
The force one body exerts on another based on distance and mass.
300
What is horsepower?
A unit of power equal to 746 watts
300
While modeling Kaelyn accelerates down a runway at 3.20 m/s^2 for 32.8 s until she finally falls off the runway. Determine the distance traveled before falling.
1720 m
300
A ball is dropped from a height of 20 feet. Ignoring air resistance, how long does it take to hit the ground?
1.11 seconds
400
What is inertia?
an object's resistance to changes in its state of motion
400
Why don’t all objects appear to fall at the same rate on earth?
Air resistance
400
While training for field hockey season, a 380 gram person named Brynn does 32 pushups in a minute, displacing her torso by a distance of 8.5 cm vertically for each push up. Determine the total work done while moving upward (32 times).
10 J
400
Which line shows acceleration
b-c
400
Are you accelerating or decelerating when you go from standing to sitting?
Accelerating
500
How long will it take a bus travelling 82 km/hr to go 36 kms? Answer in minutes.
25.7 minutes
500
Brynn is rolling a giant snowball, and is trying to move it to a safe spot so she can hide from her competitors. If Brynn is pushing with a force of 47.7 N and the snowball has a mass of 32 kg, what is the acceleration of the snowball?
1.5m/s^2
500
Lexi is out with her friends. Misfortune occurs and Lexi and her friends find themselves getting a workout because Leah fell asleep. They apply a cumulative force of 1080 N to push Leah 218 m to her house. Determine the work done on Leah.
235,000 J
500
Sophia is dropped into a deep well and is heard to hit the water 3.41 s after being dropped. Determine the depth of the well.
57.0 m
500
Why does a soccer ball stay in the air longer than a field hockey ball?
It is lighter and there is more air resistance because the surface area is greater