29 terms

5 hr

A boy walks at a speed of 4 km/hr. How much time does he take to walk a distance of 20 km?

40 km/hr

A race car driver covers a distance of 80 km in 2 hours. Calculate his speed.

3 s

How many seconds does it take an apple to fall a 29.4 ft tree if it is falling at a speed of 9.8 ft/s?

10 s

A baby crawls at a speed of 2.5 m/s. How long will it take the baby to crawl 25m?

120 seconds

You need to get to class, 180 meters away, and you can only walk in the hallways at about 1.5 m/s. (if you run any faster, you'll be caught for running). How long will it take to get to your class?

43.9 m/s

A plane travels 395,000 meters in 9000 seconds. What was its speed?

64 km/hr

It takes Serina 0.25 hours to drive to school. Her route is 16 km long. What is Serina's average speed on her drive to school?

24 m

You drop a penny from the top of a building. It falls at a speed of 8m/s. It took the penny 3 seconds to hit the ground. How tall is the building?

45 m

You're playing hide and seek with your little brother. How far can you get away from your little brother if you can travel at 3 m/s and you have 15s before he sees you?

74 m/min

A bullet train is moves 4440 meters in 60 minutes. What is the train's speed?

4 min

A skydiver falls 640 ft from the ground at a speed of 160 ft/min. How long will it take the skydiver to reach the ground?

0.5 hr

Carmela bikes a constant speed of 20km/hr in a 10 km marathon. How long does it take her to finish?

Distance

is the length of the path between two points

Displacement

is a straight line from the starting point to the ending point

Fancy science words for start and finish

Initial & Final

SPEED

Distance an object travels in a certain amount of time.

FORMULA FOR SPEED

d/t

VELOCITY

Speed in a direction

INSTANTANEOUS SPEED

Rate at which an object is moving at a given moment in time

AVERAGE SPEED

Total distance divided by total time

CONSTANT SPEED

Speed that does not change

ACCELERATION

Speeding up, slowing down or changing direction

m/s, cm/s, km/hr

Units of speed

When something changes it position compared to a reference point

Motion

motion

Occurs when there is a

change in position of an object with

respect to a reference starting point.

change in position of an object with

respect to a reference starting point.

position

location of an object.

displacement

The change in position is determined by the

distance and direction of an object's change in

position from the starting point to the ending point.

distance and direction of an object's change in

position from the starting point to the ending point.

direction

the line, or path along which

something is moving, pointing, or aiming. It is

measured using terms

something is moving, pointing, or aiming. It is

measured using terms

up, down, left, right,

forward, backward, toward, away from, north,

south, east, or west.

forward, backward, toward, away from, north,

south, east, or west.

terms used to measure direction: