Question

formula of velocity,work and speed​

Answer 1

Answer:

Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.

Assume friction is negligible in your calculations, so that the work done on the object equals its kinetic energy. Take the square root of the number on the left side of the equation to find the velocity. For example, the square root of 28.6 equals 5.3, so the velocity is 5.3 m/s.

Answer 2

$\huge \purple{velocity}$

Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation V = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.

$\huge \pink{work}$

To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd . If the force is being exerted at an angle θ to the displacement, the work done is W = fd cos θ.

$\huge \blue{speed}$

The formula for speed is speed= distance ÷ time . To work out what the units are for speed, you need to know the units for distance and time. In this example, distance is in metres (m) and time is in seconds (s), so the units will be in metres per second (m/s)