1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ainat [17]
4 years ago
13

Show that a body projected vertically up from the ground, the distance travelled by it in the last second of its upwards motion

is an constant independent of its initial velocity
Physics
1 answer:
cricket20 [7]4 years ago
6 0

Answer and explanation:

Let v_1 be the velocity of a body projected vertically up, 1 second before it reaches its maximum height. We know, from the kinematics equations, that the distance traveled y in an interval of time t is equal to:

y=v_0t-\frac{1}{2}gt^{2}

Then, in the last second, the distance traveled y_1 is equal to:

y_1=v_1t-\frac{1}{2}gt^{2}

But the velocity v_1 is related to the time by the equation:

t=\frac{v_1}{g}\\\\v_1=gt

And substituting this expression in the equation above, we obtain:

y_1=gt^{2}-\frac{1}{2}gt^{2}\\\\y_1=\frac{1}{2}gt^{2}\\\\y_1=\frac{1}{2}(9.8m/s^{2})(1s)^{2}\\ \\y_1=4.9m

It means that the distance traveled by the body in the last second of its motion is a constant, independent of its initial velocity.

You might be interested in
State the relation between acceleration and momentum​
polet [3.4K]

Answer:

Acceleration is the rate of change in velocity. Momentum is the mass times the velocity. So if you multiply the mass times the acceleration, you get the of change of momentum.

8 0
3 years ago
PLEASE HELP!
Step2247 [10]

Answer:

A) 4n

Explanation:

He throws a snowball with a force of 4 N to the right, while the snowball pushes the person with a force of 4 N to the left. The given scenario is balanced because the same amount of force is acting in both direction.

7 0
4 years ago
What is Newton's scientific view?
Alinara [238K]

Answer:

Newton's first law of motion concerns any object that has no force applied to it.

Explanation:

three laws of motion and the law of universal gravitation.

7 0
3 years ago
What is heredity? i think its physics
Rashid [163]
It's the passing of traits/characteristics from the parent(s) to the offspring(kids).<span>This is how offspring cells become predisposed to the genes/traits of the parent cells</span>.
8 0
3 years ago
When u wake up in the morning and you see few on the ground, where did it come from, and how did it form?
Pavlova-9 [17]

Answer:

If you mean dew not few, than the cause of dew is condensation.

Explanation:

At night, the air temperature gets lower, causing the water in its vapor state in the air to turn to the liquid state.The water will gather on most solid surfaces, especially grass and other plants. The dew came from the water in the air.

4 0
3 years ago
Other questions:
  • The bigclaw snapping shrimp shown in (Figure 1) is aptly named--it has one big claw that snaps shut with remarkable speed. The p
    13·1 answer
  • Which law represent a balanced chemical equation?
    9·2 answers
  • PLSSS HELP 10 MORE MINS LEFT UNTIL THIS IS DUE The diagram shows you the direction heat energy is moving. Based on the diagram,
    5·1 answer
  • What is physics and is it related to chemistry? ​
    5·1 answer
  • If a atom loses a neutron what happens
    5·1 answer
  • When the Sun shines on your face, you feel warmth from its _____.
    7·2 answers
  • Which of the moon’s properties prevents it from being pulled inward by Earth?
    15·2 answers
  • Tudy the images about geologic time.
    11·1 answer
  • Is a computer translucent?
    6·1 answer
  • 3. What is Newton's 1st Law?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!