A 59 g particle is moving to the left at 21 m/s . How much net work must be done on the particle to cause it to move to the right at 49 m/s

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules

Which branches of natural science include the study of an organism that lived 10 million years ago

It is really hard for me right know