. Apply the appropriate rule for significant figures to calculate the following: (a) 1.58 x 0.03, (b) 1.4 + 2.53, (c) 2.34 x 102 + 4.93 (Answer (a) 0.05, (b) 3.9, (c) 2.39 x 102)​

Since the pully is a simple machine so the mechanical advantage is a 1

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.