Answer:
The force required will be "300 N".
Explanation:
The given values are:
Mass of object,
m = 300 kg
Acceleration,
a = 1 m/s
Now,
The force will be:
⇒
On substituting the values, we get
⇒
⇒
A swimmer swims 40 miles in 80 seconds. What is the swimmer’s average speed?
1 answer:
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1) 12.5 N east
There are two forces acting on the box along the horizontal direction:
- The applied force of 15 N east, we indicate it with F
- The force of friction of 2.5 N west, we indicate it with
Taking east as positive direction, we can write the two forces has
Therefore, the net force on the box will be:
And the positive sign means the direction is east.
2)
We can solve this part by using Newton's second law:
where
is the net force on the box
m is its mass
a is the acceleration
For the box in this problem,
(east)
m = 5.0 kg
Solving for a, we find the acceleration:
And the direction is the same as the net force (east)
Answer:
a) intensity
b) E = 0.0406 V/m
Explanation:
given data:
Power = 30 kW
R = 33×10^3 M
1) Intensity is given as
2) electric field is given as
Solving for E
E = 0.0406 V/m