A Frisbee is lodged in a tree branch 7.0m above the ground. A rock thrown from below must be going at least 3.0m/s to dislodge the Frisbee. How fast must such a rock be thrown upward if it leaves the thrower's hand 1.3m above the ground? Express your answer using two significant figures.
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.
A Frisbee is lodged in a tree branch 7.0m above the ground. A rock thrown from below must be going at least 3.0m/s to dislodge the Frisbee. How fast must such a rock be thrown upward if it leaves the thrower's hand 1.3m above the ground? Express your answer using two significant figures.
Given:
- The distance of frisbee above the ground is s=7 m.
- The speed of the rock is v=3 m/s.
- The height at which rock leaves the thrower's hand h=1.3 m.
The expression from equation of motion is given by,
Here, u is the required speed of the rock, g is the gravitational acceleration and t is the time when rock touches the frisbee.
The expression from equation of motion is given by,
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