Kinematics
What is the equation for calculating acceleration?
acceleration = change in velocity / time
State Newton’s Second Law
Newton’s Second Law states that the net force on an object is equal to its mass times its acceleration: F=ma
What is the equation for impulse?
Impulse = Force × time
What factors affect the force of friction between two surfaces?
The nature of the surfaces in contact and the normal force between them.
Convert 20 km/h to m/s.
5.56m/s
A runner increases speed from 2 m/s to 6 m/s in 4 seconds. What is the runner's acceleration?
1m/s2
A 15 kg object is pushed with a force of 45 N. What is its acceleration?
a=3m/s2
A 4 kg object moves with a velocity of 5 m/s. What is its momentum?
p=20 kg
What is the coefficient of friction?
The coefficient of friction is a dimensionless value that represents the ratio of the frictional force between two bodies to the normal force.
A car is traveling at 30 m/s. How long will it take to travel 150 meters?
5seconds
How long does it take for an object to fall from a height of 20 meters (assuming no air resistance)?
2.02seconds
What is the net force acting on an object accelerating at 2 m/s² with a mass of 5 kg?
F=10N
A 1.5 kg ball is thrown at 10 m/s and comes to a stop in 0.5 seconds. What is the impulse?
J=15N
A block is being pulled with a force of 15 N, and the frictional force is 5 N. What is the net force?
Fnet=10N
What is the acceleration of an object that goes from 10 to 60 m/s in 5 seconds?
a=10m/s2
If an object moves at 8 m/s for 10 seconds, how far does it travel?
80meters
Calculate the weight of a 60 kg object on Earth (g = 9.8 m/s²).
F=588N
A truck with a mass of 2000 kg is traveling at 15 m/s. What is its momentum?
p=30,000kg
How does increasing the surface roughness affect friction?
Increasing surface roughness generally increases friction.
If a ball is thrown horizontally at 20 m/s and is in the air for 4 seconds, how far does it travel?
d=80 m
What is the velocity of an object after 4 seconds if it is accelerating at 3 m/s² from rest?
12m/s
Explain the difference between inertia and force.
Inertia is the resistance of an object to change in its motion, while force is what causes the motion to change.
If the velocity of an object is halved, what happens to its momentum?
The momentum is halved.
A block is being pushed with a force of 50 N, and the coefficient of friction is 0.3. What is the frictional force?
Ff=15N
A 10 kg object accelerates at 3 m/s². What is the force applied to the object?
F=30N