Units
Velocity and Acceleration
Forces
Circular Motion
Energy
100
This is the unit for Forces, also named after the scientist who developed the theory.
What are Newtons (N)?
100
This is the formula for _____.
What is velocity?
100
A 5.5 kg bowling ball is traveling down the track at an acceleration of 8m/s2. The force of the bowling ball is _____.
What is 44 N?
100
This is the formula for the force that pulls you towards the direction of the rotation.
What is Centripetal force?
100
This is how a type of energy changes into another type of energy without ever creating or destroying more energy.
What is the conservation of energy?
200
This is the unit for velocity, a rate of distance with direction.
What is m/s?
200
This is the formula for _____.
What is acceleration?
200
A 11kg dog accelerates from rest to 15 m/s as he chases after a ball in 8 seconds. The net force of the dog as he runs is ____.
What is 20.6 N?
200
Commonly implied as an fictitious force, this force feels like it's pulling you away from the circle, but really the tangential velocity is what gives you this feeling.
What is centrifugal force?
200
This is a property of matter that determines how difficult it is to move or stop the object and usually is measured in mass.
What is inertia?
300
This is a unit for acceleration and free fall, the rate of a changing velocity.
What is m/ss?
300
One is a rate of distance over time. The other is also a rate of distance over time but with direction, making it a vector.
What is speed and velocity?
300
When punching on a wall, the wall does not break and even hurts the fist a bit. This is because of _________.
What is Newton's 3rd law of motion?
Every action has an equal and opposite reaction.
300
These laws describe the nature of the planets and their travel paths through space, which include:
1) Their orbit is elliptical
2) The orbital period is proportional to the size of the orbit
3) Planets cover the same space in the same about of time.
What is Kepler's Laws?
300
A ball traveling at 20 m/s has 1600 J of kinetic energy. What is the mass of the ball?
What is 8 kg?
400
This is a unit used to describe Work.
What is Joules (J)?
400
A car travels at uniform velocity a distance of 100 m in 4 seconds. The velocity of the car is ____.
What is 25 m/s?
400
A rightward force is applied to a 6-kg object to move it across a rough surface at constant velocity. The object encounters 15 N of frictional force. Use the diagram to determine the gravitational force, normal force, net force, and applied force. (Neglect air resistance.)
What is the state of equilibrium?
Fg= 58.8N
Fn= 58.8N
Fa= 15N (since the object is going at a constant velocity, it must cancel out the friction)
400
A particle is traveling in a circle of radius 1.5 m and with an angular velocity of 10 rad/s. The tangential velocity of the particle is _____.
What is 15 m/s?
400
A 75kg roller coaster cart is sitting at the top of a hill. It starts to accelerate down the hill with an average velocity of 33.5 m/s. Given this information, the height of the hill is ____.
What is 56.1m high?
500
This is the unit used to describe Power.
What is a Watt (W)?
500
A deer is at rest until it hears a rustling in the bushes. It dashes away and covers a distance of 134 meters in 10 seconds. The acceleration of the deer is _____.
What is 2.68 m/s2?
500
A rightward force of 25 N is applied to a 4-kg object to move it across a rough surface with a rightward acceleration of 2.5 m/s/s. Use the diagram to determine the gravitational force, normal force, frictional force, and net force. (Neglect air resistance)
What is Fnet= 10N to the right?
Fg= 39.2 N
Fn= 39.2 N
Ff= 15N
500
A 4000 kg spaceship runs close to a 1800 kg asteroid, with about 500 m between them. The gravitational pull the spaceship exerts on the asteroid is ______.
What is the gravitational pull of 1.92*10-9N?
500
A new conveyor system at the local packaging plan will utilize a motor-powered mechanical arm to exert an average force of 890 N to push large crates a distance of 12 meters in 22 seconds. Determine the power output required of such a motor.
What is 485 W?