Answer:
0.5mv^2=50, v=5, 25/2×m=50, m=50×2/25, So, the answer is 4
Answer:
Explanation:
Given
Distance between home and school is 39 km
Total time taken
i.e.
Total Distance traveled =39+39+39=117 km
displacement=39 km
Thus Average speed
Average velocity
Answer and Explanation:
They are both correct.
This is because potential energy is when there is potential for the object to have energy, while kinetic energy is energy that is moving already.
So, as the ball falls, it loses its potential energy, or "still/Stalled" energy, and gains kinetic energy, or moving energy.
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Answer:
the average acceleration is 8.8 m/s^2
Explanation:
The computation of the average acceleration is shown below;
As we know that
a = (v − u) ÷ t
where
a denotes average acceleration
v denotes the speed at the bottom of the slope
u denotes the speed at down the slop
t denotes time
= (25 - 3) ÷ 2.5
= 8.8 m/s^2
hence, the average acceleration is 8.8 m/s^2
The vector sum is the algebraic sum if the two vectors have the same direction.
The sum vector is zero if the two vectors have the same magnitude and opposite direction
Vector addition is a process that can be performed graphically using the parallelogram method, see attached, where the second vector is placed at the tip of the first and the vector sum goes from the origin of the first vector to the tip of the second.
There are two special cases where the vector sum can be reduced to the algebraic sum if the vectors are parallel
case 1. if the two vectors are parallel, the sum vector has the magnitude of the sum of the magnitudes of each vector
case 2. If the two vectors are antiparallel and the magnitude of the two vectors is the same, the sum gives zero.
In summary in the sum of vectors If the vectors are parallel it is reduced to the algebraic sum, also in the case of equal magnitude and opposite direction the sum is the null vector