Answer: faster
Explanation:
Given
hammer is dropped from a height of 12 ft on the surface of the moon
Here, the potential energy is converted into kinetic energy
That is velocity is a function of the square root of height. The more the height, greater is the velocity.
So, the hammer hits the ground faster .
Answer:
a) The angle of refraction is approximately 34.7
b) The angle the light have to be incident to give an angle of refraction of 90° is approximately 53.42°
Explanation:
According to Snell's law, we have;
The refractive index of the glass, n₁ = 1.66
The angle of incident of the light as it moves into water, θ₁ = 27.2°
a) The refractive index of water, n₂ = 1.333
Let θ₂ represent the angle of refraction of the light in water
By plugging in the values of the variables in Snell's Law equation gives;
θ₂ = arcsin(0.5692292265) ≈ 34.7°
The angle of refraction of the light in water, θ₂ ≈ 34.7°
b) When the angle of refraction, θ₂ = 90°, we have;
θ₁ ≈ arcsin(0.803) ≈ 53.42°
The angle of incident, θ₁, that would give an angle of refraction of 90° is θ₁ ≈ 53.42°
The llamas average acceleration from 15 to 20 seconds is 5
formula= W=f*d
w=work done
f=force
d=distance
w=f*d
w= 5n*0(does not budge)means does not move so distance is zero
w=5J
The work done by the children on the sumo wrestler is 5J
Answer: 16.8 m
Explanation:
The motion of the lemming is a projectile motion, consisting of two independent motions:
- on the horizontal (x) axis, a uniform motion, with constant speed v = 2.87 m/s
- on the vertical (y) axis, an accelerated motion, with constant acceleration (downward)
The lemming lands in the water at x = 5.32 m away from the bas of the cliff, so we can calculate the time it takes to hit the water:
And now, by considering the motion on the vertical direction:
we can find the height of the cliff (h) by requiring that y(t)=0: