Why time of descent is more than time of ascent?

But during descent the resistance acts upward and gravity acts downward so total acceleration is a=g−R/m. Now it is clear that during descent acceleration is less and we know that acceleration is inversely proportional to time because a=v/t. So time of descent is always greater than time of ascent.

How does the time of ascent compare with the time of descent?

When the object returns to its starting point the displacement is zero, and this means that the area of triangle AOB equals the area of triangle BDC. The object returns to the ground with a velocity –0,; and the graph indicates that the time of ascent (OB) is equal to the time of descent (BD).

What is the formula of time of ascent?

Hence VH = v0 Cosθ. Time of Ascent: The time taken by the body to reach the maximum height is called the time of ascent.

What does ascent time mean?

Time of Ascent (t1) The time taken by a body thrown up to reach maximum height is called its time of ascent.

At what point is the air resistance greater than the weight of the body?

Answer: As the object accelerates the air resistance increases but the weight stays the same, so the resultant force is not as great as before but the object is still accelerating. Therefore the object falls at a steady speed it is no longer accelerating. This is called terminal velocity.

What is the meaning of ascent and descent?

As nouns the difference between ascent and descent is that ascent is the act of ascending a motion upwards while descent is an instance of descending.

How do you calculate descent time?

A good rule of thumb is to allow yourself two minutes for each 1,000 feet of altitude you need to lose. So, if you’re cruising at 10,000 feet above field elevation, start descending 20 minutes before your planned arrival.

What is the relation between time of flight and maximum height?

Time is taken to reach maximum height: it is half of the total time of flight.

What is meaning of ascent and descent?

Both ascend and descend come from the Latin verb scandere, which means “to climb.” It’s the prefixes that make all the difference. The a- of ascend makes the word mean “climb up,” while the de- of its antonym makes descend mean “climb down.” Definitions of ascend. verb. travel up, “We ascended the mountain”

What happens if air resistance is greater than gravity?

As learned above, the amount of air resistance depends upon the speed of the object. Thus, more massive objects fall faster than less massive objects because they are acted upon by a larger force of gravity; for this reason, they accelerate to higher speeds until the air resistance force equals the gravity force.

Is air resistance less than gravity?

With air resistance, acceleration throughout a fall gets less than gravity (g) because air resistance affects the movement of the falling object by slowing it down. How much it slows the object down depends on the surface area of the object and its speed.

What is the difference between time of ascent and descent?

The time of ascent is less than the time of descent. where ‘a’ is retardation due to air resistance and u is the initial velocity. Suppose a ball is thrown upward with velocity u having additional retardation ‘a’ due to air resistance (as well as g is there). Then for time of ascent……..

How does the direction of air resistance affect the descent?

Just think about the direction of the forces involved during the ascent and descent. On the way up, the air resistance is down in the same direction as gravity, and will have a greater acceleration than with no air resistance. This means that it come to a stop in less time. On the way down, air resistance is up, opposite the direction of gravity.

Why does velocity decrease during descent and not during ascent?

During descent F opposes motion while gravity supports it. Thus the rate of decrease in velocity during ascent is greater than the rate of increase in the velocity during descent. The neatest answer I know to this uses energy rather than force….

How do you calculate the acceleration of air during descent?

Let resistance of air be R = m a. The resistance always act in the opposite direction of motion. So during ascent it acts downward and gravity also acts downward so total acceleration add to give a = g + R / m. But during descent the resistance acts upward and gravity acts downward so total acceleration is a = g − R / m.