A 50.00 Kg crate (m1), and a 200.00 Kg refrigerator(m2), are pushed by an amphetamine crazed toddler with a force of 12,000.0 N. The toddler first pushes towards the right, then crawls around and pushes towards the left. (Note: no friction) Find the following : [I] Acceleration of system towards right
[II] F on m1 from m2 when pushed towards right
[III] Acceleration of system towards left
[IV] F on m2 from m1 when pushed towards left

Amass has an acceleration of 10- 2t. what is its velocity and displacement if it started at x- 4m and the initial velocity was 8m/s? at what time does it have 0 velocity? graph all graphs.

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?