A 1000-kg car is moving along a straight road down a 30∘ slope at a constant speed of 20.0m/s. What is the net force acting on the car?
Answers
Answer:
net force acting on the car is zero
Explanation:
given data
mass of car = 1000 kg
slope = 30°
constant speed = 20.0 m/s
to find out
net force acting on the car
solution
we know here that car is moving with given 20 m/s velocity so here net force acting on the car will be zero
as net force is express as
Force = mass × acceleration .....................1
and here acceleration is change of velocity per change in time
and here change in velocity is 0
so that net force will be zero
so net force acting on the car is zero
Final answer:
In this scenario, the car is moving at a constant speed down a slope, which according to Newton's first law of motion, means that the net force acting on the car is zero.
Explanation:
The key to figuring out this problem lies within understanding Newton's first law of motion which states that an object will stay in constant motion as long as the net force acting upon it is zero. In this case, the car is moving at a constant speed implying that the net force, or the sum of all forces acting on it, equals zero. As the car moves down a slope, there's the force of gravity pulling it downwards and the normal force from the road acting upwards. When the car moves in a constant speed, these two forces are balanced, making the net force zero (0 Newtons).
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Answers
the formula will fit in, once you know the formula you are good to answer.
k.e.=1/2 mv^2
c. remains the same
b. decrease
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Answers
and as it descends and more and more of it goes under, the
buoyant force on it increases during that time.
As soon as the object is completely underwater, it doesn't matter
how deep under it is, the buoyant force on it remains the same.
As an object sinks in a fluid, the buoyant force decrease.
Hope this helped.
Answers
Heat transfer is the flow of heat due to temperature difference.
The rate of increase in the energy content of the room is 1560 W.
What is heat transfer?
Heat transfer is the flow of heat due to temperature difference. The heat flow from higher temperature to the lower temperature.
Given information-
Initial temperature of the room is 20 degree Celsius.
The room contains a 40-W light bulb, a 110-W TV set, a 300-W refrigerator, and a 1110-W iron.
The rate of increase in the energy of the room is the difference of energy increasing in the room and the energy leaving to the room.
Thus the rate of increase
Energy inside the room is the sum of all the energies increasing as,
As there is no heat transfer through the walls. Thus the energy leaving to the room is,
Thus put the values in the first equation as,
Thus the rate of increase in the energy content of the room is 1560 W.
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Final answer:
The rate of increase of the energy content of the room when all electric devices are on is 1560 W.
Explanation:
To determine the rate of increase of the energy content of the room, we need to calculate the total power consumption of the electric devices. Adding up the power ratings, we have:
Total power = 40 W + 110 W + 300 W + 1110 W = 1560 W
Therefore, the rate of increase of the energy content of the room when all of these electric devices are on is 1560 W.
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Answers
Answer:
In cold air, the molecules mover slower because of the colder tempature, however, in hot air they move faster this is because the molecules are being heated up. Hot = faster, cold = slower
Explanation:
Answers
some other forces on the object that cancel out the first one.
Are you looking for the answer ... an "UNBALANCED" force ?
That's a very poor way to describe it, because there's no such thing
as a balanced or unbalanced force. The thing that's balanced or
unbalanced is a GROUP of forces, not a single force.