A3.0 kg ball tied to the end of a 50 cm long string being swung in a circle in a horizontal plane at constant speed. if the tension of the string is 3.8 n, what is the speed of the ball?
question 31 options:
a)
1.2 m/s
b)
1.0 m/s
c)
1.4 m/s
d)
0.8 m/s

The speed of the ball is 0.8 m/s.

(D) is correct option.

Explanation:

Given that,

mass of ball = 3.0 kg

length = 50 cm

We need to calculate the speed of the ball

Using relation between the centripetal force and tension

Where, m = mass

T = tension

r = radius

Put the value into the formula

Hence, The speed of the ball is 0.8 m/s.

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015