Answer:
80m<em>/</em><em>s</em>
Explanation:
Final velocity is given by
v=u+at
when a motorcyclist starts from rest, initial velocity (u) =0
therefore
v=0+4*20
v=80m/s
that's the answer
Answer:
8.24 m/s
Explanation:
Given:
t = 2.10 s
v₀ᵧ = 0 m/s
vₓ = 22.2 cos(-68.2) m/s
aₓ = 0 m/s²
Find: v₀
In the x direction:
v = at + v₀
22.2 cos(-68.2) = (0) (2.10) + v₀ₓ
v₀ₓ = 8.24
v₀² = v₀ₓ² + v₀ᵧ²
v₀² = (8.24)² + (0)²
v₀ = 8.24 m/s
Answer: large reflector located in orbit above the Earth's atmosphere
Explanation:
Since the student wants to see the big weather patterns in the upper atmosphere of the planet, and she will therefore need to have excellent resolution, the type of telescope that is ideal for her to use is a large reflector located in orbit above the Earth's atmosphere.
It should be noted that the refractor or a radio telescope isn't ideal in this situation as they will not capture the bug weather pattern and doesn't have an excellent resolution like the large reflector.
Answer:
Explanation:
Let the velocity of projection be V .
component of velocity in vertically downward direction = v cos 44.1
component of velocity in horizontal direction = v sin 44.1
s = ut + 1/2 gt²
611 = v cos 44.1 x 5.4 + 1/2 x 9.8 x 5.4²
= 611 = 3.88 v + 142.88
v = 120.65 m /s
b )
horizontal component of velocity of projectile = v sin 44 .1 = 120.65 sin44.1
= 83.96 m /s
horizontal displacement = 83.96 x 5.4 = 453.38 m
c ) horizontal component will remain unchanged so horizontal component
= v sin 44 .1 = 120.65 sin44.1
= 83.96 m /s
d ) velocity of projectile just before striking the ground
v = u + gt
= v cos 44.1 + 9.8 x 5.4
= 120.65 xcos 44.1 + 9.8 x 5.4
= 86.79 + 52.92
= 139.71 m /s
Explanation:
Using properties of 30-60-90 triangles, the distance from the vase to the mirror is 2/√3, and the distance from the mirror to the girl is also 2/√3. So the light travels a total distance of 4/√3 meters.
t = d / v
t = (4/√3 m) / (3×10⁸ m/s)
t = 7.7×10⁻⁹ s
