Formulas
s=d/t
What is the definition of speed?
change in position over a period of time
A basketball rolls 8 m in 2 seconds. What is its speed?
4 m/s
10 hours
True or False: Acceleration can be negative
True!
What is the formula to calculate time?
t=d/s
What are the two parts of velocity?
A baseball is thrown 30 ft in 2 seconds. What is its speed?
15 ft/sec
How far can a cheetah run in 5 seconds if it runs at 8 m/s?
40 meters
True or False: When an object changes direction, it accelerates.
True!
What is the formula to calculate distance?
d=s x t
What is acceleration?
change in speed over time
It takes 50 minutes to fly 200 miles. How fast was the helicopter moving?
4 mi/min
How long does it take to get to Charleston (180 miles away) if you drive at a speed of 60 mph the whole way?
3 hours
A car speeds up from 20 m/s to 50 m/s in 3 seconds. What was its acceleration?
10 m/s2
Draw the speed triangle!
(Teacher approves)
What are the two types of acceleration?
Change in speed and change in direction
How fast is a bird if it flies 150 miles in 2 hours?
75 mph
How far can the fastest plane in the world fly in 3 hours if it flies at a speed of 700 mph?
2100 miles
A train slams on the breaks and slows from 40 m/s to 0 m/s over 10 seconds. What was its acceleration?
-4m/s2
What is the formula for acceleration?
a=(final speed-initial speed)/time
What type of unit is km/h?
Speed
How fast is a comet if it travels 12,000,000 miles in 3,000 hours?
4,000 mph
How far could a boat travel if it sailed for 5 days at a speed of 5,000 miles per day?
25,000 miles
A plane going 150 mph accelerates to 200 mph in 25 seconds? What was its rate of acceleration?
2 mph/s or 2 mi/hr/s