Answer:
Explanation:
Given,
mass of the object,m = 0.30 Kg
initial speed, v_i = 3 m/s
time of collision = 0.20 s
final speed, v_f = -4 m/s
Impulse = change in momentum
Hence, impulse of the object is equal to
A river has a steady speed of 0.480 m/s. a student swims upstream a distance of 1.00 km and swims back to the starting point. (a
1 answer:
Steady speed of river = 0.480 m/s
Swimming speed of student in still water = 1.40 m/s
When the student is swimming upstream the velocity he is going up = 1.40-0.48= 0.92 m/s
When the student is swimming downstream the velocity he is going down = 1.40+0.48= 1.88 m/s
Time taken to travel upstream =
Time taken to travel downstream =
Total time taken = 18.12+8.87 = 26.99 minutes
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Answer:
Explanation:
The electrostatic potential energy for pair of charge is given by
U=1/4π∈₀×(q₁q₂/r)
Hence for a system of three charges the electrostatic potential energy can be found by adding up the potential energy for all possible pairs or charges.For three equal charges on the corners of an equilateral triangle,the electrostatic potential energy is given by:
U=1/4π∈₀×(q²/r)+1/4π∈₀×(q²/r)+1/4π∈₀×(q²/r)
U=3×1/4π∈₀×(q²/r)
Substitute given values
So