Smashing Dynamics
Level 4, 2026-10-21
All answers must have a value and units
Metric Distance
cmcentimeterbasic unit of distance
mmeter100 centimeters
kmkilometer1000 meters
Imperial Distance
ininch2.5 centimeters
ftfoot12 inches
mimile5280 feet, 1.6 kilometers
Time
secsecondbasic unit of time
minminute60 seconds
hrhour60 minutes
dayday24 hours
Other
ggravity-10 m/sec/sec
A dog is dropped out of a plane and falls for 4 sec until it hits water. The water creates a deceleration of 8 m/sec/sec and it takes another 18 sec to sink to the bottom. How fast will it be going when it hits the bottom?
[2]
Two rockets blast off with upwards accelerations (not including gravity) of 9 m/sec/sec and 10 m/sec/sec. How much faster will the fastest rocket be going after 3 sec?
[2]
A bus traveling at 25 ft/min decelerates at 4 ft/min/min. How long will it take to stop?
[1]
A dog is dropped out of a plane and falls for 6 sec until it hits the ground. How fast will it be going when it hits the ground?
[1]
A bus speeds up to 4 cm/day in 6 day. What is its acceleration?
[1]
A car traveling at 2 ft/min decelerates at 3 ft/min/min. How long will it take to stop?
[1]
A person traveling at 8 ft/hr stops in 4 hr. What is its acceleration?
[1]
A train accelerates at 5 cm/sec/sec for 2 sec. How fast is it going?
[1]
A tiger speeds up to 8 m/sec in 3 sec. What is its acceleration?
[1]
What is 5 secs in days?
[1]
A bus accelerates at 9 in/hr/hr. How long will it take to get to a speed of 23 in/hr?
[1]
What is 3 hrs in secs?
[1]
A car is dropped out of a plane and falls unitil it hits the ground. If its speed is 83 m/sec when it hits the ground, how long did the fall take?
[1]
A train is dropped out of a plane and falls for 10 sec until it hits water. The water creates a deceleration of 6 m/sec/sec and it takes another 10 sec to sink to the bottom. How fast will it be going when it hits the bottom?
[2]
Planet X has gravity that is one sixth the gravity on Earth. If a bike is dropped for 4 min on Planet X, how fast will it be going?
[1]
A car is dropped out of a plane and falls for 2 min until it hits water. The water creates a deceleration of 6 m/sec/sec and it takes another 30 min to sink to the bottom. How fast will it be going when it hits the bottom?
[2]