Kinematic Equations
What is the equation for calculating velocity?
Velocity = Displacement/time
Which law states that an object at rest will stay at rest, and an object in motion will stay in motion with a constant velocity unless acted upon by an external force?
Newton's 1st Law of Motion
What type of force opposes the motion of an object?
Force of Friction
An object is thrown vertically upward. What is its acceleration at the highest point?
-9.8 m/s2
Define inertia.
The tendency of an object to resist a change in motion.
Which kinematic equation can be used to determine displacement?
(Vf+Vi)/2 times t
x=Vit+(1/2)at2
What is the formula for calculating force?
F=ma
What is the formula for calculating gravitational force?
F=ma where a=-9.8m/s2
A car is traveling at a constant speed of 20 m/s. Is there a net force acting on it? Why or why not?
0N, because there is no acceleration. The forces are at equilibrium.
What is the unit for force?
Newtons
How can you rearrange the kinematic equations to solve for time?
Solve for t
According to Newton's second law, what is the relationship between force, mass, and acceleration?
Force and Acceleration are directly proportional
Mass and Acceleration are inversely proportional
How does the magnitude of air resistance change as the speed of an object increases?
The air resistance gets stronger
A ball is dropped from a height of 10 meters. How long does it take to hit the ground?
1.43s
How does mass affect an object's inertia?
The more mass, the greater the inertia.
If an object's initial velocity is 5 m/s and it accelerates at 2 m/s^2 for 3 seconds, what is its final velocity?
11 m/s
If an object has a mass of 10 kg and an acceleration of 2 m/s^2, what is the force acting on it?
20 Newtons
If an object experiences a net force of 50 N and has a mass of 2 kg, what is its acceleration?
25 m/s2
An object is moving with a velocity of 5 m/s to the right. What is its acceleration if it starts moving at 10 m/s to the right after 3 seconds?
1.67 m/s2
What is the net force acting on an object if it is in equilibrium?
0 N
A car accelerates from rest at a rate of 4 m/s^2 for 10 seconds. What is its final velocity?
40 m/s
A force of 20 N is applied to an object with a mass of 5 kg. What is its acceleration?
4 m/s2
A car with a mass of 1000 kg accelerates at 4 m/s^2. What is the net force acting on it?
4000 N
A rocket is launched into space with an initial velocity of 500 m/s. If the acceleration is constant at 25 m/s2, how long does it take for the rocket to reach a velocity of 1000 m/s?
20s
When a book is setting on a table, what is the force acting opposite the Force of gravity?
Normal Force