If the frequency of wave is 400 Hz and its
wavelength is 2.5 m, what is the velocity?
a 3000 km/s
b 100 m/s
C 10000 m/s
d 1000 m/s

D) 1000 m/s

Explanation:

You have the wavelength and frequency, you just need to solve for velocity. You can do this by multiplying each side of the equation by frequency.

Hope this helps.

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft