Question

An object moves in uniform motion at 25 m/s and takes 1.0 seconds to go a quatar circle. What is the radius of the circle

Answer 1

If the it took the object travelling at 25m/s 1 second to travel a quarter of the circle, it means a quarter of the circle is 25m (it travels 25m in one second).

If the quarter of the  circle is 25m than the circumference of the circle is 100m.

We want to calculate the radius of the circle.

Remember that the equation for finding the circumference contains the radius. We can use that equation to solve for the radius.

Circumference = 2πr

π = pi or 3.1415...... ( a number )

r = radius

Since we know the circumference, plug it in.

100m = 2πr

solve for the radius by isolating r.

100m/2π = r

r = radius = 100m/2π = 50m/π = 50/π meters

Answer: Radius = 50/π meters