Forces and Motion
Force is an example of this type of Unit
What is Vector?
If a scale is calibrated to be measured in Newtons, what would a 5 kg watermelon read on the scale?
What is 49 N
The force exerted by a fluid on an object opposing motion through the fluid
What is drag force
states that acceleration of an object is proportional to the net force and inversely proportional to the mass of the object being accelerated
What is Newton's second law?
A push or a pull is called a _______.
What is force?
What is Newtons?
The apparent weight of a 40 kg person on an elevator descending from the 8th floor with an acceleration of 2m/s2 downward
What is 312 N
As the speed of an object increases, the magnitude of the drag force _______
What is increases
the formula of Newton’s second law
What is a = Fnet/mass?
another term for the vector sum of all the forces on an object
What is net force?
All accelerations are the result of an ___________ acting on an object.
What is unbalanced force?
If you are on an elevator and the cable breaks, what would your apparent weight be defined as?
What is 0 or weightless
The constant velocity that is reached when the drag force equals the force of gravity is called
What is terminal velocity
an object at rest will remain at rest and a moving object will continue moving in a straight line with constant speed, if and only if the net force acting on that object is zero
What is Newton's first law?
A specific name for the force that a string or rope exerts is _____
What is tension?
What type of force exists when an object from the external world touches a system, exerting force on it
What is contact force?
the weight of 17.0kg of Groceries
What is 167 N
How do athletes increase or decrease their terminal velocities?
What is changing their body orientation and shape? or what is surface area?
This Law states that Forces come in pairs
Newton's Third Law
the main object in a Free Body Diagram
What is the system?
Two examples of this are gravitational force and magnetic force
What is a field force?
Draw a free diagram of a scale with a person standing on it while in an elevator that is moving upward
- Show to presenters to see if it is correct -
When the drag force equals the gravitational force, the object is in __________ so it no longer accelerates
What is equilibrium?
states that for every action there is an equal and opposite reaction
Newton's Third Law
What is a physical representation that shows the forces acting on a system?
What is free-body diagram?