To resolve point A and B we need the concepts related to conservation of momentum (By collision) and Kinetic Energy. Conservation of momentum is given by the equation,
Our values in the statment are:
Part A) As it is in an icy intersection, there is two different components (x,y) then,
Then the magnitude is,
Part B) To obtain the Kinetic Energy Loss we need to use its equation, which is given by,
The final energy is given by,
Then the change in Kinetic Energy is
<em>There was a loss of KE of 183.02kJ</em>
Answer:
The force of impact of the water bottle is F = 13,475 N
Explanation:
Given data,
The height of the antenna, h = 275 m
The mass of the 1 L water bottle, m = 1 kg
Let the bottle moves distance immediately after the impact is, d = 0.2 m
The force exerted by the bottle on the bushes at the ground is given by the formula,
F = mgh / d
Substituting the values
F = 1 x 9.8 x 275 / 0.2
= 13,475 N
The value of the force of impact can be reduced by increasing the value of d, it is like the lowering the hand along with the motion of the ball to catch it thereby reduce the force of impact.
The force of impact of the water bottle is F = 13,475 N
Answer: B) Methyl alcohol requires less than half as much energy per kg to evaporate than water does
Explanation:
Latent heat of vaporization is the amount of heat required to convert 1 kilo gram of liquid into its vapor state without change in its temperature.
Heat of vaporization is more for water than for methyl alcohol which means more heat is required to convert from liquid to vapour form.
As the Heat of vaporization for methyl alcohol (1100) is almost half as that of Heat of vaporization for water (2257) , it means Methyl alcohol requires less than half as much energy per kg to evaporate than water does.
Air drag is the frictional force which is due to air molecules and it is always opposite to the direction of motion
So here direction of air resistance is always opposite to the motion or velocity
Now if Car is travelling then the force on the car due to engine is always in the direction of velocity of car
Because here engine will provide the force to accelerate the car.
So opposite to that motion there is air resistance.
So here correct answer will be
<em>B) The forward force applied by the engine</em>
Friction is the force that is resisting the motion of an object so it will always point in the opposite direction of that of movement. ... The force of gravity points downwards . So when you do work against gravity it means that the force acting on that object points in the upward direction .
