6234

Physics Work,Power & Energy Level: Misc Level

At the bow of a ship on a stormy sea, a crwman conducts an experiment by standing on a bathroom scale. In calm waters, the scale reads 180 Ib. During the storm, the crewman finds a maximum reading of 224 Ib and a minimum reading of 121 Ib.

(a) Find the maximum upward acceleration experienced by the crewman.m/s2

(b) Find the maximum downward acceleration experience by the crewman. m/s2


6222

Physics Work,Power & Energy Level: Misc Level

A 300 g baseball traveling at 30 m/s is struck by a bat in the direction from which it came at 40 m/s. Find the impulse of the force on the baseball.

a. 12 N/s

b.4.5 N/s

c.21 N/s

d. 18 N/s


6180

Physics Work,Power & Energy Level: Misc Level

Car going down hill. potential energy becomes?Heat or net energy does not change?

If a car goes downhill its potential energy (energy due to position) is converted to kinetic energy (energy due to motion)


6150

Physics Work,Power & Energy Level: Misc Level

an object moving in a circle with constant speed has zero acceleration.

-true- false


6132

Physics Work,Power & Energy Level: Misc Level

A standard automobile b attery is rated at 12 V and 70 ampere hours. Translate those figures into Joules of stored energy. For short periods the battery can deliver a current of 300 A. What is the delivered power in watts?


6062

Physics Work,Power & Energy Level: Misc Level

The work function for metallic caesium is 2.14 eV. Calculate the kinetic energy and the speed of the 4+4=8 electrons ejected by light of wavength a) 750 nm, b)250 nm


6029

Physics Work,Power & Energy Level: Misc Level

A 60 g golf ball is dropped from a height of 2m and rebounds to 1.5 m. How much energy is lost?


6028

Physics Work,Power & Energy Level: Misc Level

A hill is 100 m long and makes an angle of 12 degrees with the horizontal. As a 50 kg jogger runs up the hill, how much work does gravity do on the jogger?


6027

Physics Work,Power & Energy Level: Misc Level

A 60 kg woman runs up a flight of stairs having a rise of 4 meters in a time of 4.2 seconds. What average power did she supply?


6026

Physics Work,Power & Energy Level: Misc Level

An Amount of work equal to 1 joule is required to compress the spring in a spring. To what height can this" gun shoot a 20- gram marble?


5994

Physics Work,Power & Energy Level: Misc Level

A 0.24-kg ball is dropped from a height of 3.5 m and bounces to a height of 1.8 m.Whatis its loss in potential energy?


5993

Physics Work,Power & Energy Level: Misc Level

Each step of a ladder increases one ,s vertical height 39 cm .If an 86.0-kg painter climbs 6 steps of the ladder, what is the increase in potential energy?


5992

Physics Work,Power & Energy Level: Misc Level

Compare the kinetic energies of a biker and a biker (with a combined mass of 73.0 kg) traveling at 2.52 m/s and the same biker and biker traveling twice as fast.


5791

Physics Work,Power & Energy Level: Misc Level

the potential energy, U is calculated using the formula U= mgh. if m=12 kg, g= 9.8 m/s 2 and h=6.50 m, the potential energy U with the correct significant figures is?


5578

Physics Work,Power & Energy Level: Misc Level

How much work is done by a 3300.0 kg mass of water falling a distance of 80.0 m down a water fall?


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