General Kinematics
Sig Figs
Constant AND Average Velocity
Free fall
100

This is the acceleration at the very top point on the path of a projectile.

What is 10 m/s/s?

100

How many sig figs in 0.004560?

4

100

A car drives east at a constant velocity of 20.0 m/s for 15.0 s. What is the displacement?

300.0 m east

100

Definition of free fall

An object moving through air and the only force acting on it is the force due to gravity.

200
This is the distance that a ball released from rest will fall during the 2nd second if it traveled distance H during the first second.
What is 3H?
200

This type of zero is ALWAYS significant.

sandwich zeros (between counting numbers)

200

A toy car moves from x = 2.0 m to x = -8.0 m in 5.0 s. What is the average velocity?

-2.0 m/s

must have the negative sign

200

T/F: Only objects that are falling can be in free fall.

False. 

Direction does not matter for free fall, only the conditions: the only force acting is the force due to gravity.

300
This is the value that can be found from the area under a velocity-time graph.
What is displacement?
300

25.67/4.2

6.1

2 sig figs

300

A car travels with constant velocity of 18.0 m/s. How long does it take to travel 2.50 km?

139 s

300

T/F: Any object that is moving downward is in free fall.

False

When air resistance becomes a factor, objects cannot be in free fall. Also, a falling object with some sort of thrust downward thrust, like an airplane or rocket, could not be in free fall

400
This is the type of acceleration that an object must have in order to be able to use the top three equations on your equation sheet.
What is constant?
400

103.4 - 5.1

98.3

round to 10ths place

400

A cyclist speeds up from rest to 11.0 m/s in 7.50 s. How far did she travel during this time?

41.2 m

400

An object is thrown down from a tower with an initial speed of 6.0 m/s. It strikes the ground after 2.50 s. How far did it fall?

Use g = 10 m/s/s

46.25 m

500

This is how long it will take a 5 kg object to hit the ground if dropped from rest at a height of 12.5 m. You can ignore air resistance.

What is 1.58 seconds?

500

12.11 + 18.0 + 1.013

31.1

round to 10ths place

500

A student places timers at equal intervals along a path. At t = 0, a cyclist starts along the path. She passes the first timer at 3.0 s and the second timer at 7.0 s.  Is her speed increasing, decreasing, or staying constant?

decreasing

500

A ball is thrown upward with an initial speed of 15.0 m/s. What is the maximum height it reaches?

g=10m/s/s

11.25 m

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