1.
a 4 kg object is moving 15 m/s to the right. a 6 n force
pushes for 5 seconds to the left.
a. how much momentum does it start with?
b. how much impulse acted on the object?
c. what is it's change of momentum?
d. under the diagram, calculate the final velocity of the object.

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.