Forces
What is the equation for force?
F=ma
How is mass different from weight
Mass is the amount of mass and does not change depending on what planet you are on. Weight is the amount of matter plus gravity
What is the equation for acceleration?
a= (vf - vi )/t
what is the equation for velocity?
v=d/t
speed = distance / time
If an object has a force of 10 N acting upwards, what force (and in what direction) is needed to balance the 10 N force?
10 N downwards
What is the formula for momentum?
p=mv
momentum=mass x velocity
Gravity on Earth is always equation to what acceleration?
9.8 m/s2
An object travels 50 meters in 5 seconds. What is the object's speed?
10 m/s
An object has a mass of 3 kg and is accelerating at 3 m/s2, what is the object's force?
9 N
Trevor shoots a basketball and it hits the backboard. The ball bounces off the backboard towards Trevor. Based on Newton's Laws why did that happen?
Every action has an equal and opposite reaction
An object starts at rest and accelerates to 50 m/s in 10 seconds. What is the objects acceleration?
5 m/s2
An object's speed is 25 m/s. How long would it take the object to travel 75 meters?
3 seconds
If a box has a net force of 4 N and is accelerating at a 2 m/s2, what is the mass of the box?
2 kg
A driver of a car sees a baby bunny in the middle of the road and slams on his brakes.
The driver and his passenger move forward as the car comes to a stop. What term (think Newton's Laws) best describe what happened?
Inertia
During a football game, a student accidentally knocks similar gym bags, one empty and one full of shoes and clothes, off the back of the bleachers. If there is no wind resistance, which bag will hit the ground first?
They will both hit the ground at the same time.
A quarterback throws a football at a speed of 24 m/s. If it travels 72 meters, how long does it take to reach the receiver?
3 seconds
A person's mass is 70kg. What is their weight (in Newtons) on Earth?
735 N
The propeller on a boat pushes the boat forward against the force of the water current. Why does the boat still move forward?
a forward thrust from the propeller that is greater than the backward force of the water current.
A car is moving at a speed of 24 m/s and comes to stop in 4 seconds. What is the objects acceleration?
-6 m/s2
A car accelerates at 5 m/s2 for 3 seconds. What is the car's final velocity?
15 m/s