The position of an object of mass 5 kg as a function of
time is giving by r = (20m/s4)t4
i + (12 m/s3)t3 j. Find the
force acting on the object as a
function of time. Express the
force in unit vectors. Hint:
Remember that Newton's
second Law relates the force
to the acceleration

Explanation:

Given that,

The mass of the object, m = 5 kg

The position vector is,

Velocity,

Acceleration,

Newton's second law of motion is given as follows:

F = ma

Put all the values,

Hence, this is the required solution.

i'm just gonna leave this comment here, so i can get a challange done-

explanation:

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.