say true or false. if false, why?

Question

1) a boy is throwing two stones, one vertically up and the other vertically down with the same speed. the second stone experiences greater acceleration.

2)in order to hit a target, a man should point his rifle in the same direction as the target.

(no jokes please, really urgent)

Answer 1

Why don't you care what the reason is if it's true? :-)

Answer 2

1) True (weight effect)
2) depends on the distance between the man and the target.
When you are throwing a stone , the stone goes down because of its weight. It's the same thing with a rifle. If you are far from the target, the man should point a bit higher. If you are not, the ball will not get the time to go down.

Answer 3

1) false. Both stones experience the same acceleration, the acceleration due to gravity (9.8m/s/s). The second stone will get to a faster speed quicker because the acceleration is in the direction of motion, but it is the same. So, they are both under the same (yet opposite) acceleration (Downward)

2) tricky. My answer is false though. He should point it above the target. No matter how fast anything is going, under gravity, (Say) the bullet will travel towards the earth. So if he wanted to hit the target dead center, the man should point its rifle a little higher than the bulls eye.

Answer 4

False, acceleration due to gravity is constant.

The rifle wielder should expect the bullet to
fall due to gravity; to figure in the horizon.
The distance to the target must be factored in.
For example, a quarterback doesn't attempt
to throw a football in a perfectly straight line
to the receiver, instead the quarterback
throws the football with upward velocity.

Answer 5

True.