Suddenly, you see a flash of silver: an Agujon needlefish (Tylosurus acus) leaping over your boat. At the top its trajectory, you estimate that it is 5.0m above the surface of the water and travelling at 6.0 m/s. 5 m m v=6- 3 m

A roller coaster with a mass of 725 kg starts with a speed of 22.0 m/s at the bottom of a hill.  At the top of the hill the roller coaster has a speed 14.0 m/s.(see diagram below). Assuming friction is minimal, what is the height of the hill? ? Give your answer in m to 2 decimal places.

Attempt 3 Steven carefully places a m = 1.15 kg wooden block on a frictionless ramp so that the block begins to slide down the ramp from rest. The ramp makes an angle of 0 = 57.3° up from the horizontal. Which forces do nonzero work on the block as it slides down the ramp? V gravity spring O friction O normal How much total work has been done on the block after it slides down along the ramp a distance of 1.85 m ? total work done on the block: Nancy measures the speed of the wooden block after it has gone the 1.85 m down the ramp. Predict what speed she should measure. m/s final speed after sliding from rest:

PLEASE ANSWER ASAP!!!!!!!!!!

The famous cliff divers of Acapulco leap from a perch 35 m above the ocean. How fast are they moving when they reach the water surface? What happens to their kinetic energy as they slow to a stop in the water?

At Schlitterbahn, a 75.0 kg person rides a 12.0 m high water slide. If dissipative forces do -6250 J on the rider as they go from rest at the top of the ride to the bottom, then what is the speed of the rider at the bottom of the slide? Include a diagram of the situation and indicate the mechanical energy at both the top and at the bottom of the slide.

Consider a mass m=81.6 kg sliding on a frictionless surface as shown in the figure below. It begins with a speed of vi = 1.81 m/s at a height of yi = 21.4 m above the ground. It then travels down one hill and up the next until it momentarily comes to rest with a speed vi = 0.  a) What is its kinetic energy of the mass at the start? b) What is its gravitational potential energy of the mass at the start?

Draw a sketch and also a FBD to identify the relevant forces doing work.  A football player pushes a tackling dummy forwards at a constant 0.85 m/s for 11m using 7150 J of energy. The tackling dummy has a mass of 120 kg. a) Find the force of the football player exerts.  b) Draw a FBD of the dummy. Be sure to include friction in the diagram. What is the value of this friction force?  c) How many joules of work has been done by friction?  d) Is the mass necessary for this question? Explain.

Jason, with mass 80kg, does a cannonball into a pool. If he jumps with an initial downward velocity of 5 m/s, what is his kinetic energy after 1 second? a 9000J b 200000J c 300J d 20000J e 600J

When you drop a pebble from height H, it reaches the ground with kinetic energy K if there is no air resistance. From what height should you drop it so it will reach the ground with twice as much kinetic energy? 4H O 2H None of the given choices O VZH