Sally applies a total force of 249 N with a rope to drag a wooden crate of mass 100 kg
across a floor with a constant acceleration in
the x-direction of a = 0.1 m/s
2
. The rope tied
to the crate is pulled at an angle of θ = 53◦
relative to the floor.

If two students are running down the hall toward each other, trying to get to class, and they have the same mass and acceleration, what will happen when they collide? will their forces cancel out or will each one experience a reaction?

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above

Select the correct answer. what does the process of natural selection involve?