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IceJOKER [234]
3 years ago
13

A ball is thrown upward at 4 meters per second starting from ground level. How long does it take for the ball to return to the g

round?
Physics
1 answer:
nata0808 [166]3 years ago
6 0

Answer:

it takes 2 min to return

Explanation:

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Starting from rest, a person runs with a constant acceleration, traveling 40 meters in 10 seconds. What is their final velocity?
Assoli18 [71]

Answer:

Final velocity v = 8.944 m/sec

Explanation:

We have given distance S = 40 meters

Time t = 10 sec

As it starts from rest so initial velocity u = 0

From second equation of motion s=ut+\frac{1}{2}at^2

40=0\times 10+\frac{1}{2}a10^2

a=0.8944m/sec^2

Now from first equation of motion v=u+at, here v is final velocity, u is initial velocity, a is acceleration and t is time

So v=u+at=0+0.8944\times 10=8.944m/sec

6 0
3 years ago
A 65-kg swimmer pushes on the pool wall and accelerates at 6 m/s^2. The friction experienced by the swimmer is 100 N. How many N
Helga [31]

Answer:

490N

Explanation:

According Newton's second law!

\sum Force = mass × acceleration

Fm - Ff = ma

Fm is the moving force

Ff s the frictional force = 100N

mass = 65kg

acceleration = 6m/s²

Required

Moving force Fm

Substitute the given force into thr expression and get Fm

Fm -100 = 65(6)

Fm -100 = 390

Fm = 390+100

Fm = 490N

Hence the force that will cause two cart to move is 490N

5 0
3 years ago
In what ways water helps in germination?​
quester [9]

Answer:

Water can spread germs through bacteria.

Explanation:

Bacteria can live in water and can spread to new locations when water is moved.

6 0
3 years ago
1. How will the ice water mix with the salty water? Write your hypothesis below.
andrew11 [14]
It won't be able to mix because one will not get evaporated and it wont go together
6 0
3 years ago
Here are the questions you need to answer for this assignment. After reading the questions carefully, pick arbitrary numbers to
MrRissso [65]

Answer:

this dont even explain the question

Explanation:

5 0
3 years ago
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