Answer:
When the body is kept at the surface there height of the stone is equal to zero. hence, if the height of the stone is zero then Potential energy is equal to zer
<u>Answer:</u>
3.5 x 10^-8 J
<u>Explanation:</u>
We are given,
force experienced by a charge = 3.6 x 10^-4 N; and
distance of charge from the source of electric field = 9.8 x 10^-5 m
We know that, <em>Energy = force x distance</em>
therefore, to find the potential energy of the charge, we need to multiply its applied force with the given distance to get:
Electric potential energy of a charge = (3.6 x 10^-4) × (9.8 x 10^-5) = 3.5 x 10^-8 J
Therefore, the potential energy of a charge is 3.5 x 10^-8 J.
Answer:
0.12
Explanation:
The acceleration due to gravity of a planet with mass M and radius R is given as:
g = (G*M) / R²
Where G is gravitational constant.
The mass of the planet M = 3 times the mass of earth = 3 * 5.972 * 10^24 kg
The radius of the planet R = 5 times the radius of earth = 5 * 6.371 * 10^6 m
Therefore:
g(planet) = (6.67 * 10^(-11) * 3 * 5.972 * 10^24) / (5 * 6.371 * 10^6)²
g(planet) = 1.18 m/s²
Therefore ratio of acceleration due to gravity on the surface of the planet, g(planet) to acceleration due to gravity on the surface of the planet, g(earth) is:
g(planet)/g(earth) = 1.18/9.8 = 0.12
Answer:
The time taken for the daredevil to travel the 50 m horizontally is 2.83 s.
Explanation:
Given;
angle of projection, θ = 45°
initial speed of the projectile, u = 25 m/s
horizontal distance traveled by the projectile, x = 50 m
The time taken for the daredevil to travel the 50 m horizontally is calculated as;
where;
is the horizontal component of the velocity = uCosθ
Therefore, the time taken for the daredevil to travel the 50 m horizontally is 2.83 s.
