When a soccer ball is kicked. What would we say of the force?
it is unbalanced
What is the mass of a falling rock if it produces a force of 147 N?Acceleration of gravity is 9.8m/s2
15kg
What is newton's first law?
An object in motion stays in motion, an object at rest stays at rest unless acted upon by an unbalanced force.
What is Newton's 2nd law?
Force = Mass x Acceleration
a bird with a mass of .3kg dived bombed with an acceleration of 6m/s2. What force did it hit the worm with?
1.8N
What is force measured in?
Newtons
Sir Isaac Newton was known for what accomplishment?
Newton's 3 laws and the discovery of gravity.
What net force is required to accelerate a car at a rate of 2 m/s2
if the car has a
mass of 3,000 kg?
6,000 N
An apple fell fro a tree at the rate of 2 m/s2 and hit my head with the force of 3N.
What is the mass of the apple?
1.5kg
What is the acceleration of softball if it has a mass of 0.5 kg and hits the catcher's
glove with a force of 25 N?
50 m/s2
How does the law of inertia effect the passengers on a train that is suddenly slowing down?
They are abruptly pushed forward as their body wants to continue at the same speed as the train was traveling.
When two teams are playing tug of war and neither team wins. What is said of the forces?
They are balanced
Engineers at the Johnson Space Center must determine the net force needed for a rocket to
achieve an acceleration of 70 m/s2
. If the mass of the rocket is 45,000 kg, how much net
force must the rocket develop?
3,150,000 N
What is inertia?
An objects resistance to a change in motion.
. A10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s2?
30N
what are the two forces that stop an object in motion?
Gravity, friction
You were so hungry the you stabbed a meatball with a mass of .5 kg at the acceleration rate of 4 m/s2, What is the Force you used to fork that meatball.
2N
In outer space how long would a satellite orbit the earth?
Endlessly.
A sled traveling at 3 m/s2 with a mass of 4kg will hit the wall with how much force?
12N
There was a huge hog that was walking at the rate of .5m/s2. It's mass is 2000 kg
how much force was needed to get it moving?
1000N
A car ran into a wall with the force of 180,000 N and has a mass 3000 Kg what was the acceleration rate of the car?
60m/s2
What is mass measured in?
kg, kilograms
Engineers at the Johnson Space Center must determine the net force needed for a rocket to
achieve an acceleration of 70 m/s2
. If the mass of the rocket is 45,000 kg, how much net
force must the rocket develop?
3,150,000 N
How do we describe force?
A push or a pull
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