B and C are points on the same straight line such that AB = 60 m and AC = 80 m. An object moves from A to B at an average speed of 10 m/s, then goes from B to C in 4 seconds. The object then returns to B. The average speed for the whole journey is 5 m/s. (i) Find the average speed from B to C. (ii) Find the average speed from A to C. (iii) Find the time taken to go from C to B. (iv) Find the average velocity for the whole motion.
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
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A, B and C are points on the same straight line such that AB = 60 m and
AC = 80 m. An object moves from A to B at an average speed of 10 m/s, then goes from B to C in 4 seconds. The object then returns to B. The average speed for the whole journey is 5 m/s.-
(i) Find the average speed from B to C.
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(ii) Find the average speed from A to C.
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(iii) Find the time taken to go from C to B.
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(iv) Find the average velocity for the whole motion.
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