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Why can a squirrel jump from a tree branch to the ground and run away undamaged, while a
human could break a bone in such a fall?
Consider a balanced seesaw. The balanced seesaw consists of a girl weighing 250 N on the
left side of the seesaw and a boy weighing 500 N on the right side as shown in the Figure below. The
girl on the left was given a bag of apples weighing 50 N by her mother. Where should the girl sit in
order to be in balance, assuming the heavier boy does not move? Aside from calculations, express
your answer through drawings showing a free-body diagram of forces present in the girl and boy
before and after the girl was handed a bag of apples by her mother.
Identify and explain the dynamics in rotational motion. Compare the dynamics in rotational
motion to the equivalent translational motion.
Identify and explain the kinematics in rotational motion. Compare the kinematics in rotational
motion to the equivalent translational motion
A yacht used a cylindrical winder to unwind a cable to release an anchor. Using energy methods,
what is the cable’s acceleration? Explain your answer
A car moved horizontally on a road at a constant velocity. If the mass of the car is 1,000 kg and the friction between the tires and the road was 1,500 N, what was the coefficient of friction?
A steel wire of diameter 3.6 x 10^-4 m and length 4m extends by 1.8 x 10^-3 m under a load of 1 kg and twists by 1.2 radians when subjected to a total torsional torque of 8.4 x 10^-5 Nm at one end. Find the values of Young’s and rigidity modulus
A 600kg object is raised to a vertical height of 20m in 6seconds. Find the power delivered to it in watts? Show complete solution.
A 10.00cm.tall light bulb is placed at a distance of 90.0cm from a concave mirror having a focal length of 21cm determine the image distance and the image size.
A pitcher throws a 0.2kg baseball. IF the ball starts from rest and leaves the pitcher's hand a velocity of 30m/s, how much work is done on the ball? Show complete solution.
