7) A roller coaster moves in different curves as it goes through the bumps in its track. We can easily analyze the forces at any point in the ride, by drawing a circle that matches up with the track at that point
and using our knowledge of centripetal acceleration and centripetal forces. The 550 kg car (with riders)
comes up over the hill at point A and then goes down the hill toward point B, which is 25 m below point A.
10 m
a) What is the fastest that the car can go
over the hill at point A without coming off
the tracks (where the normal force equals 0)?
15 m
B
b) If the car is going 19 m/s (which should be faster than at point a) when it gets to point B, how big is the
normal force provided by the track as the car goes over it at point B?

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.

overcharge is the right answer system