So the answer is about 18.24 m/s
this is why:
the equation for calculating the height position from the acceleration due to gravity is
h(t) = -1/2(g)t^2 + vt + p
so in this case g, or the acceleration of gravity is 9.81, the initial velocity (v) is 0, and the initial position (p) is 17. once we plug in these numbers we get the equation h(t) = -4.91t^2 + 17
we know that height is zero when it hits the ground so we can use the quadratic equation to solve for when y is zero. since time cant be negative, then out answer is the positive zero of this equation, or 1.86.
once we know this then we can plug this amount of time into the equation
v(t) = gt + v
this means that the velocity after a certain time (t) is equal to the gravitational force, in this case 9.81, multiplied by the amount of time passed plus the initial velocity (v).
since we know the initial velocity is zero and the time that the balloon hit the ground (1.86), we can multiply the gravitational force, 9.81, by the time when it hits the ground (1.86) to get 18.24 m/s
Answer:
Value of each resistor will be 3 ohm
Explanation:
It is given that three are connected to a 12 volt battery in parallel
As we know that voltage across parallel combination is same
So voltage across each resistor will be same as 12 volt
It s given that current across each resistor is amperes
From coulomb's law we know that voltage across any resistor is equal to
V = I R
So resistance will be equal to
So value of each resistor will be 3 ohm
Answer:
-8 Kgm/s
Explanation:
From conservation of linear momentum, the sum of momentum before collision is equal to the sum of linear momentum after collision
The sum of momentum before collision is 15+-35=-20 Kgm/s
Momentum after collision is
x+-12=-20
x=-20+12=-8 Kgm/s
I'm not super sure but, I would think it would be a broom and a stone. When you play curling you push a special 'curling stone' across a icy floor and special sweepers to reduce the fiction within the icy floor.