Answer:
For SI units the mass m = 5 kg.
Explanation:
The sum of all horizontal forces is must be equal to maₓ:
∑Fₓ = maₓ = 24N - 14N = 10N
maₓ = 10N
m = 10N / aₓ = 10N / 2 m/s² = 5 m/s
Explanation:
KE = 1/2mv^2
6,250 J =1/2(250kg) v ^2
<u>6250 J </u>= <u>125kgv^2</u>
125kg. 125kg
v =
Answer : First of all, to harness the solar energy and utilize it for the decomposition of water to make hydrogen fuel cell seems to be easy but practically it has many hurdles in its way. It might not work well, when the days would not be sunny. Also, the production of hydrogen fuel would require decomposing water which may need a high energy of activation, which would be more than the energy that will be produced from the fuel cell.
Answer:
Explanation:
Using
4.01 × 10^3 * 4.186 = 1.72×10^4j
In KJ 17.2kj
Answer: -31.36 m/s
Explanation:
This is a problem of motion in one direction (specifically vertical motion), and the equation that best fulfills this approach is:
(1)
Where:
is the final velocity of the supply bag
is the initial velocity of the supply bag (we know it is zero because we are told it was "dropped", this means it goes to ground in free fall)
is the acceleration due gravity (the negtive sign indicates the gravity is downwards, in the direction of the center of the Earth)
is the time
Knowing this, let's solve (1):
(2)
Finally:
Note the negative sign is because the direction of the bag is downwards as well.
