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
vova2212 [387]
2 years ago
14

a body is dropped from a height of 240m. (i)How long does it take to reach the ground. (ii) What is the velocity with which it w

ill strike the ground.
Physics
1 answer:
kramer2 years ago
5 0

Answer:

7.0 s, 69 m/s

Explanation:

If we take down to be positive, then the time to reach the ground is:

x = x₀ + v₀ t + ½ at²

240 m = (0 m) + (0 m/s) t + ½ (9.8 m/s²) t²

t = 7.0 seconds

The final velocity is:

v² = v₀² + 2a(x - x₀)

v² = (0 m/s)² + 2(9.8 m/s²) (240 m - 0 m)

v = 69 m/s

You might be interested in
Why does the moon lack an atmosphere?  
vesna_86 [32]
Because when it had any, the warmth of the sun heated the atmosphere to the point where the average speed of the gas molecules exceeded the escape velocity for a body with the moon's mass and size. So, little by little, they escaped.
8 0
3 years ago
When a cyclist moves downhill without pedalling, what type of energy does he gain?
Vesna [10]

Answer:

He is gaining kinetic energy and losing potential energy

Explanation:

3 0
2 years ago
Read 2 more answers
A projectile is launched at an angle of 29 degrees above the horizontal with an initial velocity of 36.6 at an unknown height.
fgiga [73]

The vertical velocity of the projectile upon returning to its original is 17. 74 m/s

<h3>How to determine the vertical velocity</h3>

Using the formula:

Vertical velocity component , Vy = V * sin(α)

Where

V = initial velocity = 36. 6 m/s

α = angle of projectile = 29°

Substitute into the formula

Vy = 36. 6 * sin ( 29°)

Vy = 36. 6 * 0. 4848

Vy = 17. 74 m/s

Thus, the vertical velocity of the projectile upon returning to its original is 17. 74 m/s

Learn more about vertical velocity here:

brainly.com/question/24949996

#SPJ1

8 0
1 year ago
Two persons A and B are walking with speed 5 km/h and 6 km/h
Anastasy [175]

Answer:

2

Explanation:

3 0
2 years ago
Read 2 more answers
A battery of voltage 9.0 V produces a current of 0.0175 A across a circuit. What is the resistance of the circuit?
Natalka [10]

Answer:

514.288

Explanation:

V=IR

R=V/I

R=9/0.0175

8 0
2 years ago
Other questions:
  • a student pushes a 40 in Block across the floor for a distance of 10 meters how much work was done to move the block A) 4j. B) 4
    5·1 answer
  • Which statement correctly identifies the scientific question and describes why the question is scientific?
    14·2 answers
  • If the resulting trajectory of the charged particle is a circle, what is ω, the angular frequency of the circular motion?
    9·1 answer
  • Party hearing. As the number of people at a party increases, you must raise your voice for a listener to hear you against the ba
    14·1 answer
  • A 1.89 kg object on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is 4.89 N
    12·1 answer
  • Ship A is located 3.90 km north and 2.50 km east of ship B. Ship A has a velocity of 21.0 km/h toward the south and ship B has a
    8·1 answer
  • What mass of a material with density rho is required to make a hollow spherical shell having inner radius r1 and outer radius r2
    7·1 answer
  • A cyclist travels 20km in 4hrs.What speed did the cyclist cycle at?​
    13·2 answers
  • John is preparing for his way to school. His house is 30 km away. What time will he be in school if he leaves his house at 6:30
    11·1 answer
  • Which of the following would have the smallest coefficient of kinetic friction when slid along your hang.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!