Units
This is the unit for Forces, also named after the scientist who developed the theory.
What are Newtons (N)?
a = (vf-vi)/Δt
This formula does not include _____.
What is displacement (or d)?
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?
This is the formula for the acceleration that pulls you towards the direction of the rotation.
What is ac=vt2/r?
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?
This is the unit for velocity, a rate of distance with direction.
What is m/s?
a = (vf2-vi2)/2Δd
This formula does not include _____.
What is time (or t)?
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?
This quantity must act on an object to keep it moving in a circle, even at constant speed.
What is centripetal force?
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?
This is a unit for acceleration and free fall, the rate of a changing velocity.
What is m/s2?
Δd = viΔt + 0.5aΔt2
This formula does not include _____.
What is final velocity (or vf)?
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.
This term describes the rate at which an object moves around a circle, measured in meters per second.
What is tangential speed?
A ball traveling at 20 m/s has 1600 J of kinetic energy. What is the mass of the ball?
What is 8 kg?
This is a unit used to describe Work.
What is Joules (J)?
A car travels at uniform velocity a distance of 100 m in 4 seconds. The average velocity of the car is ____.
What is 25 m/s?
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...
Fg = 58.8N
FN = 58.8N
Fapp = 15N?
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?
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?
This is the unit used to describe Power.
What is a Watt (W)?
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?
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/s2. Use the diagram to determine the net force, gravitational force, normal force, and frictional force. (Neglect air resistance)
What is Fnet = 10 N to the right
Fg = 39.2 N
FN = 39.2 N
Ff = 15N?
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?
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?