Newton's Laws
What is Newtons first law of motion?
What is an object at rest, and a n object in motion stays in motion unless acted on by an unbalanced force.
What is the formula for speed?
What is speed=distance/time
What is friction?
What is the force that opposes motion between two surfaces in contact
What is the formula for work?
What is W=Fd
What is the formula for force In the force-mass-acceleration triangle?
What is F=ma
What does newtons second law of motion describe?
What is the relationship between force, mass, and acceleration, F=ma
What is the difference between velocity and speed?
What is velocity includes direction, while speed does not.
Whoch type of friction acts on stationary objects?
What is static friction
What is the formula for power?
What is P=W/t
If F=ma, how do you solve for Acceleration?
What is a=F/m
What is Newtons 3rd law of motion?
What is for every action, there is an equal and opposite reaction.
What is speed=60/2=30km/h
What is acceleration due to gravity on Earth?
What is 9.8m/s2
If 100n of force moves an object 5m, how much work is done?
What is W=GFd=100x5=500j
If a 4 kg object accelerates at 2m/s2, what is the force?
What is F=ma = 4 x 2 = 8n
A soccer ball is kicked and moves because of which of newtons Laws?
Newtons first law (inertia) and second law (force)
A roller-coaster accelerates from 5m/s to 25m/s in 10 seconds. What is its acceleration?
What is a=vf-vi/t=25-5/100=2m/s2
If an object weighs 50N, what is its mass?
What is m=F/9=50/9.8=5.1kg
A motor does 600J of work in 2s. What is the power output?
What is P=600/2 =300 W
In the speed-distance-time triangle, what formula is used to find time?
What is time= distance/speed
A car exerts a force of 100 N and has a mass of 25kg, what is the car's acceleration?
What is a=F/m=4m/s2
A car is moving east at 50 m/s and accelerates west at 10m/s2 fr 3 seconds. What is its final velocity?
What is vf = vi + at=50 -(10 x 3)=20m/s
Why do heavier objects no fall faster than lighter ones in free fall?
What is because acceleration due to gravity is constant and does not depend on mass.
A person pushes a box with 20 N pof force but it does not move. How much work is done?
What is 0.j ( no distance, no work)
A car exercts a force of 120 N to accelerate at 3m/s2. What is the car's mass?
What is m=F=120/3=40kg