3. A car fell off a bridge in a really terrible storm! If the car is accelerating as it's floating down the river at a rate of 2 m/s°, and the force of the water pushing the car forward is 250 N, what is the
mass of the car?
I:
G: ΣF=
ma
N
kg
m/s2
a=
E:
S:
S:
ΣF=
ΣF =
Are the forces balanced or unbalanced? (circle one)

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2