The kinetic energy of a 750 kg car moving at 50.0 km h is 72300 joules.
Given,
mass of car (m)= 750 kg
speed of car (v)= 50 km/h
= 50 x 5/18
= 13.9 m/s
we know that kinetic energy= 1/2 x m x v*v
= 1/2 x 750 x 13.9 *13.9
= 72300 joules
so the kinetic energy is 72300 joules.
Energy is the capacity of an object to do work, and like work, energy's unit is the joule (J). Energy exists in many different forms, but the one we think of most often when we think of energy is kinetic energy. Kinetic energy is often thought of as the energy of motion because it is used to describe objects that are moving.
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Cubic centimeter is the answer
Given: Energy E = 5.53 X 10⁻¹⁷ J; Velocity of light c = 2.998 x 10⁸ m/s
Planck's constant h = 6.63 x 10⁻³⁴ J.s
Required: Frequency f = ?
Formula: E = hc/λ and Frequency f = V/λ
λ = (6.63 x 10⁻³⁴ J.s)(2.998 X 10⁸ m/s)/(5.53 x 10⁻¹⁷ J)
λ = 3.59 X 10⁻⁹ m
For Frequency f = ?
f = c/λ
f = 2.998 x 10⁸ m/s/3.59 x 10⁻⁹m
f = 8.35 x 10¹⁶ Hz
Answer:
d = 0.391 m
Explanation:
given,
mass of sled = 18 kg
inclined at an angle of = 28°
kinetic friction between the sled and inclined = 0.25
using energy equation
d = 0.391 m
hence, the distance traveled by the sled is equal to 0.391 m
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