How much force is used to lift a 42 kg object at a constant velocity? Why?

What is the difference between electrically neutral objects and electrically charged objects

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s