Science Help!?!?!?!?!?!?!?!?!?!?

Question

1. Which seat on a rollercoaster would you feel the effects of momentum?

A. front

B. middle

C. last seat

D. it doesn't matter

2. What is the force that keep you in you seat when you go upside down on a rollercaster?

A. momentum

B. centrififual force

C. seat belt

D. gravity

if u cud give an explanation that wud be appreciated

thanks

:]

Answer 1

ans1. itd be D coz momentum is uniform throught the body

ans2. As you go around a loop-the-loop, your inertia not only produces an exciting acceleration force, but it also keeps you in the seat when you're upside down.

a lil more explanation

as u move, ur intertia produces a force [ f=ma , intertai provides mass n movement of rollercoaster provides acceleration]. this force pushes u forward. A roller coaster loop-the-loop is a sort of centrifuge. As you approach the loop, your velocity is in a tangential direction. But the track keeps the coaster car, and therefore your body, from traveling along this straight path. The force of your acceleration pushes you from the coaster-car floor, and your inertia pushes you into the car floor. Your own outward inertia creates a sort of false gravity that stays fixed at the bottom of the car even when you're upside down. You need a safety harness for security, but in most loop-the-loops, you would stay in the car whether you had a harness or not.

Answer 2

I would say 1 is A momentum, because you feel the effect of the rest of the coaster behind you pushing forward.

Number 2 is definitely B. It is the same force that keeps water from falling out of a bucket if you swing it around in a circle vertically.  

Answer 3

ye Q1. is D and Q1. is A unless you stop half way, then it's C

objects will go in the same direction and at the same speed unless another force acts upon it.

You are going foward, rollercoaster goes up, you try to keep going foward but rollercoaster is stronger and brings you up and so on until your around.