The velocity will change (increase) by 9.8 m/s every second.
Why?
Since the ball is accelerated downward at 
we can see that the ball is on "free fall". It means that the wall was dropped with no initial speed.
Now, if we want to know by how many meters per second does the object's velocity change every second, we need to understand the units of the acceleration. Let's write the equation of acceleration for better understanding.
So, from the equation we can see that the acceleration is changing the velocity every second.
Hence, if an object has the given acceleration (acceleration due to gravity, 9.8m/s2), it means that its speed will change (increase) by 9.8m/s every second.
Have a nice day!
Like so many others in math and science,
this question raises many other questions.
A few of them are:
-- What does "the following" mean ?
-- What does "accerlation" mean ?
and
-- What are the answer choices ?
==> (any unit of length) divided by (any unit of time x any unit of time)
is a unit of acceleration.
==> (any unit of speed) divided by (any unit of time)
is also a unit of acceleration.
We know, f = ma
Here, m = 100 kg
a = 20 m/s²
Substitute their values,
f = 100 * 20
f = 2000 N
In short, Your Answer would be 2000 N
Hope this helps!
Answer:
See the explanation below.
Explanation:
Work in physics is defined as the product of force by the distance that the body travels in the direction of the force.
It can be represented by means of the following equation.
where:
W = work [J]
F = force [N]
d = distance [m]
In the given example the work is zero since the tree does not move, therefore the bear exerts a force on the tree. But there is no talk of movement of the tree, therefore the work is zero.
Answer:
The magnetic field at its center is 0.037 T.
Explanation:
Given that,
Number of coil = 705
Length = 15.5 cm
Diameter = 2.50 cm
Current = 6.5 A
We need to calculate the magnetic field at its center of solenoid
Using formula of magnetic field
Where, I = current
L = length
N = number of coil
Put the value into the formula
Hence, The magnetic field at its center is 0.037 T.
