A bicyclist starts from rest at the top of a hill and rolls down the hill without pedaling. Assuming there is no friction and the bottom of the hill is 20 meters below the top, what is the bicyclist's speed at the bottom of the hill?
19.8 m/s
You might also like to view...
A cart of mass m is moving with speed v. Is it possible for the cart's kinetic energy or the magnitude of its momentum to be larger after it collides with something?
In quantum mechanics, what is the path of the particle across the box?
a. The shortest possible distance, i.e., a straight line. b. Along the curve of the standing wave amplitude. c. Reflecting at random angles off the sides of the box. d. Reflecting off the sides of the box with the angle of incidence equal to the angle of reflection. e. The question cannot be answered.
Water surrounds hot horizontal tubes 3 cm in diameter in a nuclear steam generator having surface temperature of 800ºC. The water is at a pressure of 800 kPa. If film boiling is assumed, estimate the total convection heat transfer coefficient between the water and the tube surfaces.
What will be an ideal response?
The two most common igneous rocks are basalt and granite. Basalt is commonly found ________, and granite is found ________
A) on the ocean floor; on the continents B) on both the ocean floor and continental land; only on the continents C) on the continents; on the ocean floor D) on the ocean floor; on both the ocean floor and on continental land