motorboat and leaves a dock on a river bank for a day of fishing. Just as he turns upstream, he hears a splash but pays no attention and continues cruising at normal speed. Unfortunately, only 10 minutes later does he realize that his (fortunately watertight) lunchbox is missing. He then turns downstream, with the motor still set at cruising speed. Luckily, he sights his lunchbox floating down the river and retrieves it at a point 1  km downstream of the dock.

Can you please provide a complete solution set to this problem? Please do not skip any steps and please double check your work.    How do I find out what the final kinetic energy is?  How do I find out how much the initial kinetic energy is?  How do I find how much kinetic energy is lost?    THANK YOU!

Q24. As shown in the image below, the 16-kg block A and the 42-kg block B connected by the weightless, frictionless pulley system are released from rest. Determine the speed of block B when block A has displaced downwards by 0.7 m. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point, and proper Sl unit. A Answer: d O [o k B

Friction and drag are the primary causes of increased thermal energy in a system. True False

5. (A5-1) A water tank has the shape of an inverted square pyramid with a height of 15 m and a base side length of 21 m. It is currently filled with water to a height of 10 m, which as a density of 1000 kg/m³. Find the amount of work required to empty the tank by pumping all of the water to the top of the tank.

A miniature hill in a child’s toy collection is shown below. When released at A, a mass m slides down the path shown below, reaching the bottom (B) with a speed of vB. Assume that the hill has negligible friction. The block then slides along the rough horizontal surface a distance d before coming to rest at C.    When solving parts (a) and (b): Write the useful description about what is known and unknown. Write down the physics principle or strategy you will use. Symbolically solve for the unknowns   (a) Calculate the height of the hill using m=230.0 g and vB = 3.8 m/s (b) What is the coefficient of kinetic friction along the horizontal surface if d=14 m? Hint: Treat the motion down the hill and the motion down the rough horizontal surface as two distinct problems. What physics concepts can you apply for each?