The correct equation for the acceleration is a = (v-u)t. Option D is correct.
<h3 /><h3>What is the first equation of motion?</h3>
The acceleration can be defined as the ratio of change in velocity to time. As given in the question,
The final velocity,
Where,
v - final velocity
u - initial velocity
a - acceleration
t - time
First, bring u with v,
Now bring the t with v-u,
So,
Therefore, the correct equation for the acceleration is a = (v-u)t.
Learn more about the first equation of motion:
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Answer:
Explanation:
Given
Initially A moves towards Y axis with a velocity of 2 m/s and B moves towards X axis with velocity of 3.7 m/s
mass of both the block is same let say m
Conserving momentum in x direction
thus A moves with a velocity of 3.7 m/s towards x axis in order to conserve the momentum in x direction
Thus ball B moves towards Y direction with
And ball A moves towards X direction with
(c)Total momentum
Kinetic Energy
The diffraction f light passing through a narrow opening, provides evidence that light has a wave nature.
The mean may be calculated by summing the values of the refractive index and dividing the sum by the number of experiments. This is:
Mean = (1.45 + 1.56 + 1.54 + 1.44 + 1.54 + 1.53)/6
Mean = 1.51
The mean absolute error is the sum of the absolute values of errors divided by the number of trials:
MAE = (|1.45-1.51|+|1.56-1.51|+|1.54-1.51|+|1.44-1.51|+|1.54-1.51|+|1.53-1.51|)/6
MAE = 0.043
The fractional error is the MAE divided by the actual value:
Fractional error = 0.043 / 1.51
Fractional error = 43/1510
The percentage error is the fractional error multiplied by 100:
Percentage error = 2.85%
0.4 x 18 = 7.2 kg m/s
The momentum of the bottle after being hit is 0.2 x 25 = 5 kg m/s
7.2 - 5 = 2.2 kg m/s is the motmentum of the ball now
the velocity is 2.2/0.4 = 5.5 m/s