Acceleration = v-u/t
= (45-30)/15
= 1 km/h
Distance = ut + 1/2 at^2
s = [30 x 15] + 1/2 x 1 x 15^2
= 562.5 km
Hope this helps
Answer:
μs = 0.333 and μk = 0.24
Explanation:
Mass of crates = 22kg
F = 72newton
F =μR
Also given that g = 9.8m/s^2 which is that acceleration due to gravity
Hence R = N = mg
= 9.8 × 22
= 215.6 newton
F is frictional force
μ is coefficient of friction
N or R is normal reaction
Hence, the static friction
F =μsR
72 = μs × 215.6
μs = 72/215.6
μs = 0.333
The kinetic friction coefficient
F =μkR
When F = 52N and R = N = 215.6N
52 = μk × 215.6
μk = 52/215.6
μk = 0.24
They all search for planets by measuring properties of a star rather than of the planets themselves. ... The size of the Doppler shift that we detect depends on the tilt of a planet's orbit.
A. Controlled experiment hope this helps