Answer:
1.4
Explanation:
C. 1.4 m/s
Energy is conserved:
Initial energy = final energy
At P, the pendulum has only gravitational potential energy.
At Q, the pendulum has only kinetic energy.
PE = KE
mgh = ½mv²
v = √(2gh)
Given h = 0.1 m:
v = √(2 × 9.8 m/s² × 0.1 m)
v = 1.4 m/s
Convection is heat transfer through the movement of liquids and gases.
Answer:dont care
using sand
We can increase friction by making rough surface.
