A 300 g block on a 56-cm-long string swings in a circle on a horizontal, frictionless table at 70 rpm.

What is the speed of the block?
Express your answer using two significant figures.

What is the tension in the string?
Express your answer using two significant figyres.

Hi there!

We can begin by converting rpm to tangential velocity.

1 rotation = 2πR

Convert min to sec: 1 min = 60 sec

We can find the tension by using the equation for Centripetal motion.

T = Tension (? N)
m = mass (.3 kg)
v = velocity (4.11 m/s)

r = radius (0.56 m)

Plug in the values:

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.