Answer:
what do u mean well have a nice day
Explanation:
Answer:
Mechanical energy = 429.984J
Explanation:
Given the following data;
Mass = 7.2kg
Velocity = 2.4m/s
Height = 5.8m
To find the mechanical energy;
Mechanical energy = kinetic energy + potential energy
First of all, we would determine the values of K.E and G.P.E
K.E = ½mv²
K.E = ½*7.2*2.4²
K.E = 3.6*5.76
K.E = 20.736 J
P.E = mgh
We know that acceleration due to gravity is equal to 9.8m/s²
P.E = 7.2*9.8*5.8
P.E = 409.248
Substituting the values into eqn 1, we have;
Mechanical energy = 20.736 + 409.248
Mechanical energy = 429.984J
1) 234 s, 6.18 km
The position of the car at time t is described as
where
is the velocity of the car
The position of the head of the train instead is given by
where
d = 1.30 km is the initial distance between the car and the head of the train
is the velocity of the train
The car overtakes the train when
Substituting and solving for t,
And the distance travelled by the car is
2) 27.5 s, 0.72 km
In this case, the train is travelling in opposite direction, so we can write
Again, we can use the same equation as before
And solving for t, we find
And the distance travelled by the car is
ANSWER: Isaac Newton
EXPLANATION: It is the 3rd law
I looked it up and here's what it said
To balance the charge of 80 protons this atom has<u> </u><u><em>a cloud of 80</em></u><em> </em>electrons spinning around its nucleus.
