physics shizz?

Question

The reason a tennis ball and a solid steel ball will accelerate at the same rate, in the absence of air resistance, is that_________
a. the force acting on them is the same
b. they have the same mass
c. the ball with the larger force also has the larger mass
d. the ball with the larger force has the smaller mass
e. none

Answer 1

c.
More precisely, the gravity force F is directly proportional to the body's mass m. Acceleration a = F/m, so it comes out independent of the mass.

Answer 2

It's c. F=ma; if F is the larger and mass is larger, then a can remain constant.

A is definitely not the answer. Only acceleration is constant, force is not. If the force is the same, you would be able to apply the same opposite force to stop the motion of the balls, but you don't apply the same opposite force (just imagine, which one would kill you more easily: a tennis ball dropping on your head or a solid steel ball?)

Answer 3

If they're being dropped from a height, I think the answer would be (a). Gravity has the same effect on their acceleration regardless of the weight (if there is no air resistance).

Answer 4

A is the right answer. Both have gravity acting on them, so they will accelerate at 9.8 m/s^2. However, that's not to say that they will be going at the same velocity.

Answer 5

a.

if i push a ball at 1mph it will travel at 1mph, no faster no slower, with no gravity or air resisting, no matter what the ball is made of, size, weight ,shape, are of no consiquence.

Answer 6

e option
defintly acc. is same

cuz earth applies acc. of g=9.8m/s^2 on any thing be it elephant or ant

but force is diff

Answer 7

e

Answer 8

A