An amusement ride consists of a car moving in a vertical circle on the end of a rigid boom. The radius of the circle is 10 m. The combined weight of the car and riders is 5.0 kN. At the top of the circle the car has a speed of 5.0 m/s which is not changing at that instant. What is the force of the boom on the car at the top of the circle?
a. 3.7 kN down
b. 1.3 kN down
c. 6.3 kN up
d. 3.7 kN up
e. 5.2 kN down
d
You might also like to view...
A 400-kg box is lifted vertically upward with constant velocity by means of two cables pulling at 40.0° on either side of the vertical direction. What is the tension in each cable?
A) 231 N B) 400 N C) 800 N D) 2560 N E) 3920 N
Below 4°C, water ______________ with decreasing temperature
Fill in the blank(s) with correct word
Conduction: Two metal rods, one silver and the other gold, are attached to each other end-to-end. The free end of the silver rod is immersed in a steam chamber at 100°C, and the free end of the gold rod in an ice water bath at 0°C. The rods are both 5.0 cm long and have a square cross-section that is 2.0 cm on a side. No heat is exchanged between the rods and their surroundings, except at the ends. What is the temperature at the point where the two rods are in contact with one another? The thermal conductivity of silver is 417 W/m ? K, and that of gold is 291 W/m ? K.
A. 39°C B. 41°C C. 47°C D. 53°C E. 59°C
Meters: Decreasing the resistance of an ammeter's shunt resistance
A. allows it to measure a larger current at full scale deflection. B. allows it to measure a smaller current at full scale deflection. C. enables more current to pass directly through the galvanometer. D. converts it to a voltmeter.