Acheetah of mass 68 kg can accelerate from rest to a speed of 20.1 m/s in 2.0 s. assuming constant acceleration, what is the net force that causes this acceleration?
272 n
78 n
137 n
680 n

680 N

Explanation:

We start by calculating the cheetah's acceleration knowing that goes from rest (0 speed) to 20.1 m/s in 2 seconds:

Now we use the definition of force (F):

Therefore the force that accelerates the cheetah is 683.4 Newtons which we can round to 680 N to match the fourth choice shown

the device is called “ rocket engine”