8 points awaitinghurry pls don't spamQn..An object starts from rest and acquires a speed of 90m/sec in 60 sec. find acceleration, distance traveled and seed at the end of first 40 sec.

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

An object has a weight of 500 on earth what is the mass of this object

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?