Please give me answer of these questions
I will mark him/her as brainliest
Answers
Answer:
HOPE IT HELPS MARK AS BRAINLIEST
Explanation:
1.A) Uniform Velocity means in a certain limit a body is moving with same speed.
And non- uniform Velocity happens when body is moving with different speed.
B) Uniform speed : If an object covers equal distance in equal interval of time, then time speed graph of an object is a straight line parallel to time axis then body is moving with a uniform speed. Non-uniform speed : If the speed of a body is changing with respect to time it is moving with a non-uniform speed.
C)Search Results
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Uniform acceleration: if the rate of change of velocity changes equal in equal intervals of time it is said to be uniform acceleration .. Variable acceleration: if the rate of change of velocity changes unequally in equal intervals of time it is said to be variable acceleration.
D)Acceleration of a body is defined as the rate of change of its velocity with time. ... Retardation means negative acceleration. If the velocity of a body decreases,the acceleration is negative
E)The instantaneous velocity is the specific rate of change of position (or displacement) with respect to time at a single point (x,t) , while average velocity is the average rate of change of position (or displacement) with respect to time over an interval
2.A)Displacement-time graphs show how the displacement of a moving object changes with time.
A horizontal line on a displacement-time graph shows that the object is stationary (not moving because the displacement does not change)
A sloping line on a displacement-time graph shows that the object is moving.
In a displacement-time graph, the slope or gradient of the line, is equal to the velocity of the object.
The steeper the line (and the greater the gradient) the faster the object is moving.
B)If an object moves along a straight line, its motion can be represented by a velocity-time graph. The gradient of the line is equal to the acceleration of the object.
C)time graph plots acceleration values on the y-axis, and time values on the x-axis. In this graph, the acceleration remains constant at 2.0 m/s/s for 10 seconds. ... Acceleration is defined as a change in an object's velocity, so if an object is accelerating at 2 m/s/s, then every 1 second, the object will gain 2 m/s
3.A)Derivation of v=u +at
Initial velocity u at A =OA
Velocity changes from A To B in time t(uniform acceleration a)
Final Velocity v=BC
BC=BD+DC
v=BD+Ao
v=BD+u
Slope of velocity time graph is equal to acceleration a.
BD=at.
Therefore v=u+at.
Hence proved.
B) The total area enclosed by the straight line is displacement (S)
Area = ut + 0.5(v-u)t
We know that a = (v - u)/t
Therefore,
Area = ut + 0.5at^2
C)S= area of trapezium ACEF
S= 1/2 ( b¹ + b² ) h
s= 1/2 ( AF+CE )FE
S= 1/2 ( U+ V) T
We know -v= u+ at
v-u/a= t
now 2 in 1
S= 1/2( v+u) (v-u)
2as= ( v+u) (v-u)
2as=v²-u²
[v² - u2 = 2as]