A drum of mass 100kg is rolled into the deck of a lorry 1.5m above a horizontal floor using a plank 4m long. Calculate the work done against gravity during the process. (g=10m/s)​

Aballet student who learns with the of his instructor is demonstrating learning.

*drag each tile to the correct location in the sequence* the table shows chronological events in the life of our sun, a medium-sized star. place the missing events into the correct rows of the table.

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