A roller coaster car starts from rest then accelerates downhill at a constant 6 m/s2 for 6 s. The car then goes uphill with a constant acceleration of -2 m/s2. What is the car's velocity 4 s after it starts going uphill?

true is the correct answer

hope i

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

the temperature in kelvin of 2.0 dm3 of an ideal gas is doubled and its pressure is increased by a factor of four. what is the final volume of the gas