Motion in A Straight Line Test

Result

Motion in A Straight Line Test - 4

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Question 1
1 / -0

Average speed is defined as the total path length travelled divided by the total time interval during which

A
maximum motion has taken place

B
minimum motion has taken place

C
uniform motion has taken place

D
the motion has taken place

Solution

Average speed is the ratio of distance traveled to time spent.

To find average speed, divide the total number of km traveled by the total elapsed time in hours. The answer is the average speed in km per hour.
Question 2
1 / -0

Average speed is

A
always negative

B
always zero

C
never positive

D
always positive

Solution

Average speed is the absolute value of the average velocity or the magnitude of the velocity. Average Speed is always positive.
Question 3
1 / -0

While determining velocity from position-time graph. Velocity at any time is the slope of the _______ to the point on the graph at that instant.

A
line from origin

B
tangent

C
Unit vector

D
perpendicular

Solution

Velocity is defined as the rate of change of position with respect to time, which may also be referred to as the instantaneous velocity to emphasize the distinction from the average velocity.

In terms of a displacement-time (x vs. t) graph, the instantaneous velocity (or, simply, velocity) can be thought of as the slope of the tangent line to the curve at any point.
Question 4
1 / -0

If the position- time graph is a straight line

A
The velocity is zero

B
The velocity is increasing

C
The velocity is decreasing

D
The velocity is constant

Solution

The principle is that the slope of the line on a position-time graph reveals useful information about the velocity of the object.

If the velocity is constant, then the slope is constant (i.e., a straight line).
Question 5
1 / -0

If the position- time graph is a straight line parallel to the time axis

A
The velocity is zero

B
The velocity is constant but non zero

C
The velocity is increasing

D
The velocity is decreasing

Solution

Position-time graph of horizontal straight line parallel to time axis represents that the position of the body does not changes with the passage of time. So it represents the rest state of motion.

It means velocity of object is zero.