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WorksheetsGravity Labs
Total questions: 15
Worksheet time: 30mins
Below are four position vs. time graphs labeled (i) through (iv). Identify which graph corresponds to:
An object moving in the negative direction with a constant speed
i
ii
iii
iv
Below are four velocity vs. time graphs labeled (i) through (iv). Identify which graph corresponds to
An object moving in the positive direction with a constant speed
Below are four velocity vs. time graphs labeled (i) through (iv). Identify which graph corresponds to
An object that is accelerating in the positive direction, starting from rest
Below are four position vs. time graphs labeled (i) through (iv). Identify which graph corresponds to:
An object that is accelerating in the positive direction, starting from rest
i
ii
iii
iv
In the Graph Matching lab the motion detector used which method to measure motion?
Electromagnetic Radiation
Ultraviolet Light beams
High Frequency Sound Pulses
Bluetooth signals
A negative slope on a position time graph means:
an object is rolling down a hill
an object is moving towards you
an object is speeding up towards you
An object is free falling
In the cart on incline lab why wasn't it necessary to calculate the angle in degrees? Why was the data graphed using the sine of the angle instead?
It would be an extra, unneeded step.
There was no way to know the angle.
They wanted to make it harder
When measuring acceleration of a cart down a ramp with a very small slope, what might be a reason the acceleration is less than gravity?
There is more than one answer.
Friction acting on the wheels
Air resistance, though small, would have a greater effect.
Gravity only works when the angle is above 10 degrees.
It's impossible to measure such a small acceleration.
The Picket Fence lab was more accurate at measuring gravity because:
Pick two answers...
The photogate is more precise than the other motion detectors we've used.
The picket fence is falling freely so it measures the undiluted force of gravity.
The picket fence is so thin.
You could drop it far enough up so that it had a head start.
The distance, measured from one edge of a black band of the picket fence to the next is 5 cm. What else is needed to calculate the speed as it moves through the photogate?
The time it takes to pass through the photogate.
The mass of the picket fence.
You don't measure the speed, you measure the acceleration.
You need to know the direction because acceleration is a vector.
Does it matter how high above the photogate you drop the picket fence?
No. We're measuring the change of velocity.
It only matters that you're close enough for the photogate to know where it is.
Yes. The higher the velocity, the more gravity you measure.
Not really. The black lines are all you need.
The acceleration of gravity changes from place to place around the world. What may have the most affect in that change?
Latitude. The gravity is less close to the poles.
Altitude. The further you are from the center of the earth matters.
The ocean, because you're floating on water.
There is no gravity. The Earth sucks.
A student measured the following values of g:
9.909 m/s2 | 9.789 m/s2
9.666 m/s2 | 9.854 m/s2
What is the average value?
9.9
9.8
9.7
9.6
A student measured the following values of g:
9.909 m/s2 | 9.789 m/s2
9.666 m/s2 | 9.854 m/s2
What is the uncertainty?
0.12
0.03
0.24
0.5%
When graphing the angle and acceleration to find g you need to do what?
There is more than one answer.
Interpolate the data
Extrapolate the data
Extract the data
Create a best fit line
