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
Snowcat [4.5K]
3 years ago
7

A student throws a set of keys vertically upward to his fraternity brother, who is in a window 3.60 m above. The brother's outst

retched hand catches the keys 1.60 s later. (Take upward as the positive direction. Indicate the direction with the sign of your answer.)With what initial velocity were the keys thrown?
Physics
1 answer:
Contact [7]3 years ago
5 0

Answer:

v_{i}=10.10 m/s

Explanation:

The equation of the position is:

y=y_{i}+v_{i}t-0.5gt^{2}

Where:

v(i) is the initial velocity

The initial position y(i) will be zero and the final position y = 3.60 m.

So, we just need to solve this equation for v(i).

v_{i}=\frac{y+0.5gt^{2}}{t}

v_{i}=\frac{3.6+0.5*9.81*1.6^{2}}{1.6}

v_{i}=10.10 m/s

Therefore, the initial velocity is 10.10 m/s upwards.

I hope it helps you!

You might be interested in
if somebody swim to the right for 30 meters then swims to left for 15 meters and then swims back to the right for 50 meters what
zubka84 [21]

50m

Explanation:

Displacement is the length of path traveled which is measured from start to the finishing of the path.

    Analysis of the journey;

 Starts from:

 0                                    30m                                              from right

                  15m                                                                       to left

                                                                       50m              to right

                 

The displacement is 50m from the starting point.

Distance is total path traveled and for this problem it is 30+ 15 + 50 = 95m

learn more:

displacement brainly.com/question/5461768

#learnwithBrainly

8 0
3 years ago
PLEASE HELP!
SashulF [63]

Answer:

They gon' hate me regardless, that's why I do what I do (what I do)

See me in person i'm flawless (I'm flawless girl), i might just snatch up your dude (hahahaha)

Explanation:

i just want to be....appreciated

3 0
3 years ago
Which is the following is made up mostly of water
tatyana61 [14]

soil i think is this from apex?

8 0
3 years ago
According to Newton's first Law of motion, it takes forces to be balanced to move an object from its resting position.
Snowcat [4.5K]
False. First Law of Newton states that object tends to be at rest until an external force is applied and vice-versa. 
4 0
3 years ago
Read 2 more answers
A package is pushed across the floor a distance of 90 feet by exerting a force of 32 lbs downward at an angle of 24 ∘ with the h
Crazy boy [7]

Answer:

2632 foot-pound

Explanation:

Work done: Work is said to be done when ever a force moves a body through a given distance. The S.I unit of force is Newton (N).

From the question,

The expression for work done is given as,

W = Fdcos∅......................... Equation 1

Where W = work done, F = force, d = distance, ∅ = angle between the force and the horizontal.

Given: F = 32 lbs, d = 90 feet, ∅ = 24°

substitute into equation 1

W = 32×90×cos24

W = 2880(0.914)

W = 2632.32

W = 2632 foot-pound

4 0
3 years ago
Other questions:
  • A block, M1=10kg, slides down a smooth, curved incline of height 5m. It collides elastically with another block, M2=5kg, which i
    11·1 answer
  • A lightning bolt with 13 kA strikes an object for 14 μ s. How much charge is deposited on the object?
    13·1 answer
  • A varying force is given by F=Ae ^-kx, where x is the position;A and I are constants that have units of N and m^-1 , respectivel
    11·1 answer
  • The start-up procedure for a batch reactor includes a heating step where the reactor temperature is gradually heated to the nomi
    10·1 answer
  • Cardiovascular fitness can be measured by what?
    8·1 answer
  • A constant volume perfect gas thermometer indicates a pressure of 6.69 kPaat the triple point of water (273.16 K). (a) What chan
    12·1 answer
  • the expression like a ton of bricks means very hard would being hit by an actual ton of brick ls hurt?
    9·1 answer
  • What's the minimum Out PUT WORK<br> required to raise 14,0m3 of water 26.0m?
    12·1 answer
  • Would u rather/ have a penny that duplicates its self every day or win 1 million dollars once
    6·1 answer
  • What is the force needed to accelerate a wagon with a mass of 10 kg at a rate
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!