Answer:
Explanation:
work done by the beetle during the launch = F × d cosθ where θ is equal to 0°
change potential energy of the beetle = mgh = work done by the beetle
mgh = F d cosθ where h, height = 0.32 m and d = 0.796 mm
5.88 × 10-6 kg × 9.8 m/s² × 0.320 m / ( 0.796 ÷ 1000) m = F
F = 0.0232 N
b) the acceleration of the beetle in terms of g =
F = ma
mgh / d = ma
cancel m on both side
gh /d = a
0.320 g / ( 0.796 ÷ 1000) m = 402 .01 g
Answer:
D. Wind and solar energy help save money and reduce air pollution.
Explanation:
Answer:
Explanation:
Frictional force acting on incline = μ mg cosθ
μ is coefficient of friction , m is mass of object , θ is incline
= .09 x m x 9.8 x cos 28
= .78 m
work done by friction
= frictional force x displacement
= - .78m x 100
= - 78m
Potential energy of sli at height
= mgh
= m x 9.8 x 100 sin 28
= 460.08 m
net energy at the base
= 460.08m - 78 m
= 382.08 m
This will be in the form of kinetic energy .
1/2 m v² = 382.08 m
.5 x v² = 382.08
v = 27.64 m/s
After that it travels on plane surface .
Let the distance travelled be d
work done by frictional force
= μ mg x d
= .09 x m x 9.8 x d
This will be equal to kinetic energy at the base
.09 x m x 9.8 x d = 382.08 m
d = 433.2 meter .
Correct answer is:
<span>B. Subtract the initial velocity from the final velocity and divide the result by the time
In fact, the formula to calculate the acceleration is
</span>
<span>where vf is the final velocity, vi the initial velocity, and t the time.</span>
Answer:Red has the longest wavelength and violet has the shortest wavelength. When all the waves are seen together, they make white light. Ultraviolet (UV) light—is radiation with a wavelength shorter than that of visible light, but longer than X-rays, in the range 10 nm to 400 .
Explanation: