What is a BIOLOGICAL EXAMPLE of the 2nd law of motion?

Three blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force F⃗ F→F_vec. (Figure 1) The masses of the three blocks are  MA=MA= 11.5 kgkg ,  MB=MB= 19.5 kgkg , and  MC=MC= 38.9 kgkg ,  Answer the following questions concerning the motion of the blocks. If the blocks are now accelerated at 1.5 m/s2m/s2, what F⃗ F→F_vec is required?

A pendulum is pulled back at an angle of 20 degrees and released from rest. As the mass at the end of the pendulum swings back to its equilibrium position, which of the following variables decreases? (Select two right answers) Group of answer choices Tension in the string Velocity Acceleration Net Force

A horizontal force of 80.0 N is applied to a 5.00 kg block as the block slides a distance of 0.800 m along a horizontal floor. The coefficient of kinetic friction between the floor and the block is 0.500. If the block is initially at rest, how fast is it moving at the end of the displacement?