Ok, we're gonna have to do better than those responses or we are gonna be posting 8's in the

physical section

1)the answer is C

Explanation...

A is true, think of throwing a ball up in the air, when it reaches its max vertical distance it will have a velocity of 0, yet it will be accelerating due to the force of gravity.

B is true, for example, driving in a circle at a constant speed. Velocity is a vector, so it is direction dependant, therefore, driving in a circle would be a case where you are constantly varying the velocity.

D is true, imagine driving backwards (negative velocity) then applying the brakes (positive acceleration).

Question 2 is difficult, I got it wrong also

the answer is B

Explanation...

Air resistance is a frictional force, so on the upward path of the ball,the air resistance is adding to the force of gravity making the (-)acceleration due to gravity seem larger. The ball then reaches vertical max and begins to travel downward, only this time the force due to air resistance is going in the opposite direction of gravity, making the force of gravity seem smaller. Therefore the ball will take longer to travel down then it will going up.

Hope the explanation is clear, if not say so and I'll explain further. I'll post some more ball busters this weekend. Study hard, tick toc, tick toc..