Quiz 3 Flashcards
State the unit of gravitational field strength
Newton per kilogram or N/kg
How do we find the components of a force?
Scale drawing
How is extension calculated?
Stretched length minus original unstretched length
State the name AND the power of 10 for this prefix:k
Kilo, 10 to the power of 3
State the name AND the power of 10 for this prefix:M
Mega 10 to the power of 6
Define gravitional field strength
The force of gravity acting on 1kg of mass
State the name AND the power of 10 for this prefix: G
Giga 10 to the power of 9
How many grams in a kilogram?
1000
What is inelastic deformation?
When an object is deformed and when the force is removed it stays permanently deformed
State the name AND the power of 10 for this prefix:m
Milli,10 to the power of -3
What measuring instrument is used to measure weight?
Newtonmeter or calibrated spring balance
State 3 examples of non-contact forces
Gravitational
Electrostatic
Magnetic
State the name AND the power of 10 for this prefix:T
Tera, 10 to the power of 12
Name the force:The force exerted by a magnet on magnetic materials or other magnets
Magnetic
What does a free body force diagram show?
The forces acting on one object
What is thrust?
The force exerted by an engine
When an object is pushed along a surface,work is done against ….?
Friction
How may forces need to be applied to change the speed of a stationary object?
One
How do we check that 2 variables are directly proportional?
Divided the variables at least 3 times answer should be the same every time
State Hookes law
The extension of a spring is directly proportional to the force applied, provided that the limit of proportionality is not reached
How do you find the spring constant from a force-extension graph
calculate the gradient
How do you find the energy transferred to the spring(elastic potential energy) from a force-extension graph
Find the area under the curve
What does the line devaiting from being straight on a force-extension graph mean?
Limit of proportionality
