A wooden block of 20 x 40 x 80 cm is to be dragged along the floor by a force applied horizontally. Friction is present between the block and the floor. The surface on each side of the block is similar (i. e. same friction coefficient). In which case will the greatest force be required to pull it at constant speed.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error

In a set amount of time, a battery supplies 25j of energy to an electric circuit that includes two different loads. one of the loads produces 10 j of heat energy during this time interval. how much heat energy is produced by the second load in this time? explain your answer