Let x be the time it takes for the trip to be completed given that the speed is y.
When the time is 30 minutes (equal to 0.5 hour) shorter than x, the speed is 8 mph more than the original speed.
The equations that would best represent the given conditions are:
(1) 120 = (x)(y)
(2) 120 = (x - 0.5)(y + 8)
Simplifying,
y = 120/x
Substitute:
120 = (x - 0.5)(120/x + 8)
The value of x from the equation is 3. Thus, if I go with the usual speed, the time it will take me to finish the trip is approximately 3 hours.
The electrostatic force of attraction or repulsion is can be found as follows,
let us consider 2 bodies in gravitational field of earth. Let the distance between those two bodies is equal to r meters. The charge on the first body is Q1 and charge on second body is Q2.
By columbs force, <u>F </u><u /><u>α Q1×Q2</u><u>
</u> r²
F=<u>k Q1×Q2 </u> where k-gravitational constant.
<u /> r²
Ask me, if you have any doubt regarding this.
Answer:
at the stone age people thought that every thing in the earth is made up of 5 elements they are:-air,earth,fire,sky and water
Explanation:
Answer:
Explanation:
Let T be the tension in the string and mg is the weight of the block.
T = mg
By using Newton's second law
T - mg = ma
mg - mg = ma
a = 0
Thus, the acceleration is zero.
