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
RUDIKE [14]
3 years ago
12

From what height should you drop a ball if you want it to hit the ground in exactly 3 seconds?

Physics
1 answer:
Trava [24]3 years ago
5 0

Answer:

44.1 m

Explanation:

Given:

v₀ = 0 m/s

a = -9.8 m/s²

t = 3 s

Find: Δy

Δy = v₀ t + ½ at²

Δy = (0 m/s) (3 s) + ½ (-9.8 m/s²) (3 s)²

Δy = -44.1 m

The ball should be dropped from 44.1 meters.

You might be interested in
In an experiment, 1 mol of propane is burned to form carbon dioxide and water.
Natalija [7]

Answer:

5 moles of O2are required, you can see it in your equation.

5 0
2 years ago
You are trying to measure the mass of several different objects when you realize that there is a large wad of gum stuck to the u
nadya68 [22]

Answer:

accuracy

Explanation:

You are trying to measure the mass of several different objects when you realize that there is a large wad of gum stuck to the underside of the balance pan. Removing the gum will improve the <u>accuracy</u> of your measurements.

6 0
2 years ago
A car of mass 2400kg moving at 20 m/s slams into a cement wall and comes to a halt?
Brut [27]

Impulse = change in momentum

The car's momentum was (mass) x (speed)

Momentum = (2400 kg) x (20 m/s)

Momentum = 48,000 km-m/s

To completely stop the car, the impulse = -48,000 km-m/s .

7 0
3 years ago
No force is necessary to
igor_vitrenko [27]
No force is necessary to keep a moving object moving (in a straight line at a constant speed).
4 0
3 years ago
Small evidence is also called what?
siniylev [52]
Small evidence is also called trace evidence.
4 0
2 years ago
Other questions:
  • anice is watching her granddaughter drive a Barbie Jeep with a 6 V battery and an electric motor with 5 ohm of resistance. How m
    13·2 answers
  • Waves that move matter back and forth are called                 a.transverse waves  b.longitudinal wave     c. Medium wave
    10·2 answers
  • A plane takes off in san francisco at noon and flies toward the southeast. an hour later, it is 400 kilometers east and 300 kilo
    5·1 answer
  • If the mass of an object on Earth is 18 grams, what would the mass of the same object be on the Moon?
    7·1 answer
  • Is anyone good with 9-10th grade physics?? Please pm me I have a few questions.
    15·1 answer
  • After the cart bounces, how far does it roll back up the ramp?
    12·1 answer
  • A metal block of mass 235 g rests at a point 2.8 m from the center of a horizontal rotating wooden platform. The coefficient of
    7·1 answer
  • What force is needed to give a 4800.0 kg truck an acceleration of 6.2 m/s2 over a level road? ​
    9·1 answer
  • How is the oxygen level of blood related to its color?
    5·1 answer
  • 5. What is the velocity of a 0.5 kg ball that has a momentum of 3.00 kg m/s?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!