Forces&motion 1
What is the value for gravity (g) on earth with appropriate units?
9.8 meters/second^2
What is the tendency to resist change in motion?
Inertia
True or false. All objects have weight ?
False
True or false. All objects have mass?
True
What are the Units for Force?
Newtons
Force, Mass, Acceleration
What is Newton's law of acceleration?
Newton's 2nd law
This is the measure of the force of gravity pulling down on an object of any given mass
Weight
What law is Newton's law of Action/ Reaction?
What is the 3rd law
what are the units for acceleration?
meters per second squared (m/s^2)
When an object has a net force of zero what is the object doing?
Staying still, not moving
When and object is acted on by and unbalanced force what happens?
The object moves.
How can you reduce friction?
Add liquid or lubricant
What surfaces produce the least amount of friction?
smooth surfaces
What are the units for mass?
Killograms
If a runner is moving with an acceleration of 3m/s^2 and has a mass of 5 kg. What is the force of the runner with correct units?
15N
According to Newton's second law, increasing the force applied to a mass will have this result.
the acceleration of the object increases
Objects with a lot of mass have more ________ than objects with less mass. Making them harder to stop.
momentum
The law of inertia- objects in motion continue in motion, and objects at rest stay at rest unless acted on by and unbalanced force.
What is the equation for Newton's second law?
F=ma
If a ball is moving with a force of 49N and has an acceleration of 7m/s^2, what is the mass of the ball in correct units?
7kg
A car and a tractor trailer truck are going the same speed. The car is easier to stop because of this.
Less mass and less inertia
What happens to the strength of gravity as you get further away from earth?
Strength of gravity decreases the further you get from earth.
According to Newton's second law if an object has the same amount of force acting on it, but the objects have different masses how does that affect the acceleration?
Objects with less mass accelerate faster.
What is the equation for acceleration