Answer:
3.4 s is the correct answer to the given question .
Explanation:
As Given in the question
Vox=310 m/s
Voy=26 m/s.
As we know that
--------------eq(1)
As the velocity at the maximum height =0
Putting the value of in the equation(1) we get
Putting the value in the previous equation we get
Therefore h=3.4 s
If 56.5kJ are needed to raise the temp by 90°C and if the heater is 60% efficient that means that:
60% X y = 56.5kJ
where y is the electrical energy in kJ that the heater will use.
y = 94.2kJ
What is the direction of the frictional force?
Answer:
Direction of friction is always opposite to relative motion
Explanation:
Friction always resist the relative motion of two surface so it is always opposite to the direction of relative velocity
What is the direction of the normal force?
Answer:
It is perpendicular to the contact plane
Explanation:
Normal force is the perpendicular force which is always at 90 degree with the contact surface
How does the frictional force depend on the normal force?
Answer:
Explanation:
Friction force is directly proportional to the normal force so we can say it is given as
Let the x-axis be parallel to the incline and the y-axis rise from the incline at a right angle. By Newton's second law, if there is no acceleration in the y-direction (perpendicular to the plane), what must be the magnitude of the normal force?
Answer:
Explanation:
Normal force is equal to the component of the weight opposite to the direction of normal force
Use Newton's second law and the x-components of the forces to find the acceleration. m/s2
Answer:
Explanation:
As we know that
That's false. Convection is the process of moving heat around
by heating a fluid and letting the fluid flow to somewhere else.
There's no fluid in the space between the sun and us, so convection,
and conduction too, aren't possible. The only way for the sun's light,
heat, and X-ray energy to get here is by the process of RADIATION.