Lakhmir Singh Solutions Class 9 Physics Solutions for Exercise in Chapter 4 - Work And Energy
Prev
A man drops a 10 kg rock from the top of a 5m ladder. What is its speed just before it hits the ground? What is its kinetic energy when it reaches the ground?
Answer:
Mass of rock = 10 kg
Height of ladder, h = 5m
Initial velocity of rock, u = 0
Final velocity, v
g = 10 m/s2
Using the third equation of motion
v^2-u^2=2gh
v = 10 m/s
KE = 1/2 mv2 = 500J
Related Questions
Facebook
Whatsapp
Copy Link
Lido
Courses
Quick Links
Terms & Policies
Terms & Policies
Connect with us on social media!
2022 © Quality Tutorials Pvt Ltd All rights reserved