A crate is pushed up each of the two ramps shown in the diagram below. Based on the concept that simple machines make work easie
r, and assuming that both ramps are friction less, which statement is true?
Ramp B requires less force than ramp A.
Ramp A requires less force than ramp B.
Ramp B raises the crate higher than ramp A.
Ramp A raises the crate higher than ramp B.
Ramp B requires less force than ramp A.
Ramp A requires less force than ramp B.
Ramp B raises the crate higher than ramp A.
Ramp A raises the crate higher than ramp B.
1 answer:
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Answer:
Explanation:
a. The amplitude is the measure of the height of the wave from the midline to the top of the wave or the midline to the bottom of the wave (called crests). The midline then divides the whole height in half. Thus, the amplitude of this wave is 9.0 cm.
b. Wavelength is measured from the highest point of one wave to the highest point of the next wave (or from the lowest point of one wave to the lowest point of the next wave, since they are the same). The wavelength of this wave then is 20.0 cm. or
c. The period, or T, of a wave is found in the equation
were f is the frequency of the wave. We were given the frequency, so we plug that in and solve for T:
so
and
T = .0200 seconds to the correct number of sig fig's (50.0 has 3 sig fig's in it)
d. The speed of the wave is found in the equation
and since we already have the frequency and we solved for the wavelength already, filling in:
and
v = 50.0(20.0) so
v = 1.00 × 10³ m/s
And there you go!