Daniddmelo says it right there, don't know why he got reported.
The potential energy (PE) is mass x height x gravity. So it would be 25 kg x 4 m x 9.8 = 980 joules. The child starts out with 980 joules of potential energy. The kinetic energy (KE) is (1/2) x mass x velocity squared. KE = (1/2) x 25 kg x 5 m/s2 = 312.5 joules. So he ends with 312.5 joules of kinetic energy. The Energy lost to friction = PE - KE. 980- 312.5 = 667.5 joules of energy lost to friction.
Please don't just copy and paste, and thank you Dan cause you practically did it I just... elaborated more? I dunno.
B. motion, because if a body isn’t moving and you apply a moving force to it it will then cause the body to be put into motion as well
To solve this, we are going to use the formula for the kinetic energy of an object:
where
is the kinetic energy of the object.
is the mass of the object.
is the speed of the object.
We know form our problem that the mass of the horse is 500 kilograms, so
; we also know that the speed of the horse is 5 meter/second, so
. Lets replace those values in our formula to find
:
J
We can conclude that the kinetic energy of the horse is
6250 Joules.
Answer:
Power is defined as Work / Time
P1 = P2 = W1 / T1 = W2 / T2 W1 and W2 are not necessarily the same Power expended depends on both work input over a unit of time
R- 3.2 ohms i -4.5 amps v-? V-IR 4.5*3.2
Answer: 14.4 volts