An object moves along the x axis according to the equation x = 3.90t2 − 2.00t + 3.00, where x is in meters and t is in seconds. (a) Determine the average speed between t = 1.80 s and t = 3.70 s. m/s (b) Determine the instantaneous speed at t = 1.80 s. m/s Determine the instantaneous speed at t = 3.70 s. m/s (c) Determine the average acceleration between t = 1.80 s and t = 3.70s. m/s2 (d) Determine the instantaneous acceleration at t = 1.80 s.
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.
An object moves along the x axis according to the equation
where x is in meters and t is in seconds.
m/s
(b) Determine the instantaneous speed at t = 1.80 s.
m/s
Determine the instantaneous speed at t = 3.70 s.
m/s
(c) Determine the average acceleration between t = 1.80 s and t = 3.70s.
m/s2
(d) Determine the instantaneous acceleration at t = 1.80 s.
m/s2
Determine the instantaneous acceleration at t = 3.70 s.
m/s2
(e) At what time is the object at rest?
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