Answer:
Yes it is true because static friction help us to make grip between the foot and the ground surface
Explanation:
Yes, as we know that the friction between two surface is of two types
1) Static friction
2) Kinetic friction
When two surface moves relative to each other then the friction force between two surface is kinetic friction and it always opposes the relative motion of two rough surface
While when one surface has tendency to move with respect to its contact surface but if it can not move on it then in this case it is static friction
So relative motion is not possible in this type of friction
So static friction helps to prevent slipping
Answer:
The least efficient light bulb is the first one (25 W - 210 Lumen)
Explanation:
Efficiency can be defined as what you want to obtain over what you need to produce it. In this case Eff= Wattage / Lumen. For each light bulb, their efficiency is: 8.4 / 11.12 / 15.7 Lum/W
Answer:
acceleration=(v final-vinitial)/time
a=(vf-vi)/t
2=(30-10)/t
2=20/t
t=20/2=10 seconds
distance=v0t+at²/2
d=10 x 10+ 2x 10²/2=100+100= 200 m
Explanation:
I don't really know but I don't think you can... I can't explain it either. Sorry im no help
