1. A 50 kg roller coaster car is launched, from ground level, at 20 m/s. How fast will it be moving when it reaches the top of a loop, which is 12 m above the ground? 2. A 200 g model rocket is observed to rise 100 m above the ground after launch. What must have been the launch speed of the rocket at the ground?

3. (This one’s a toughie) A 10 kg monkey swings on a vine from a point which is 40 m above the jungle floor to a point which is 15 m above the floor. If the monkey was moving at 2 m/s initially, what will be his speed at the 15 m point?

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a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

car a and b are moving in opposite directions

plz mark.me the brainliest i rlly need this kind of yours in exchange

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular