Velocity vs. Time for a Cart 20
15
10
5
Velocity (m/s)
0
-5
-10
-15
-20
0 1 2 3 4 5 6 7
Time (s)
What is the magnitude of the change in the momentum of the cart from t=0 to
t=3 seconds?
A. 20 N-S
B. 30 N-s
C. 60 N-S
D. 80 N-S

What kind of simple machine is a catapult?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )

Me with this and you will be marked brainliest