25 Miles per hour? I'm not quite sure what the questions asking
Answer:
Car has more power output than crane
Explanation:
We have given that mass of the crane m = 1000 kg
Height through which crane lift the steel beam h = 10 m
Acceleration due to gravity
So work done by crane
Time period is given as t = 5 sec
We know that power
Now mass of the car = 1000 kg
Initial velocity u = 0 m /sec
Final velocity v = 10 m/sec
We know that work done is equal to the change in kinetic energy
So work done
Time ids given as t = 2 sec
So power
So car has more power output than crane
Answer:
Weight = 490 N
Explanation:
The two forces labeled and are the force of gravity and the normal force that the surface acts upon the object. These are equal and in opposite directions cancelling each other.
The other two forces and are both pointing to the right, and therefore add up to give a net force of:
50 N + 75 N = 125 N pointing to the right.
Since the net acceleration of the object is given as 2.5 , we can use it in Newton's equation for the net force on an object to solve for the object's mass:
Notice that since all units are in the SI system, the mass comes directly in kilograms (unit of mass in the SI system)
Now, to find the weight of the object, we multiply its mass times the acceleration of gravity (9.8 ):
Weight =
Again, since all quantities are expressed in SI units, the weight (a force) will come out in units of "Newtons" (N)
Answer:
eight
Explanation:
it's atomic number is 8 which mean that an oxygen atom has eight protons in it's nucleus