Answer:1) the total distance is the sum of the two distances
60 km + 45 km = 105 km
2) The displacement is the net movement, or the difference between the initial position and the final position
Call x the initial position, then the final position is x + [60km - 45km]
And the displacement is x + (60km - 45km) - x =60km -45 km = 15 km
Explanation:
Answer:
The total work done will be zero.
Explanation:
Given that,
Mass = 100 kg
Force = 392 N
Velocity = 20 m/s
Distance s= 10 m
We need to calculate the work done
Using balance equation
The net force will be



The net force is zero.
Hence, The total work done will be zero by all forces on the object.
The amount of extra electrons present on the negative surface is
57.2 x
.
Distance =1.6 cm
Side = 24 cm
Electric field = 18000 N/C
Calculating the capacitance in the metal plates is necessary.
Using the capacitance formula

Putting the value
C = 8.85 x
x (24 x 
/1.6 x 
C = 0.318 x
F
<h3>Calculation of potential</h3>
V = Ed
V = 18000 x 1.6 x
V
V = 288 V
<h3>Calculation of charge</h3>
Q = CV
Q = 0.318 x
x 288
Q = 91.54 x
C
Charge on the both the plates
Q = +91.54 x 
Q = - 91.54 x 
Calculation of excess electrons on the negative surface:
n = q/e
n = 91.54 x
/ 1.6 x 
n = 57.2 x
electrons
Hence, the number of excess electrons on the negative surface is
57.2 x
.
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Answer:
d = 61.75 m
Explanation:
Given that,
A ball droped from a building.
We need to find how fast is it traveling after falling 3.55 s.
As it is dropped, its initial velocity is equal to 0.
Let d is the distance it covers after falling 3.55 s.
We can use second equation of motion to find d.

Here, u = 0 and a =g

So, it will cover 61.75 m after falling 3.55 seconds.