A, something to remember is that if the numbers are even the answer too will be even. Every time hope this helps :>
Work done = fore × distance
wd= 47N ×o.25m
wd= 12.22Nm
Answer:
Explanation:
Volume of lead object = volume of aluminium object = V
mass of lead object > mass of aluminium object
When both the objects immersed in water, the buoyant force acting on both the objects.
Buoyant force = Volume immersed x density of water x gravity
As the volume of both the objects is same, so the buoyant force acting on both the objects is same.
So, weight in air of lead object is more than the weight in air of aluminium object.
Answer:
Fluorine
Explanation:
Fluorine is the most reactive nonmetal on the periodic table. It is a halogen on the table, which is located in Group 17.
Hope this helps!
Answer:
a)a= - 6.28 m/s²
b)a= - 4.08 m/s²
c)a= - 1.69 m/s²
Explanation:
Given that
θ = 4º
When car is going up then friction force will act downwards
Lets take a is the acceleration a m/s²
From second law of Newton's
ma = - mg sin θ - μ mg cosθ
a = - g sin θ - μ g cosθ
a)
For dry concrete
μ = 0.7
a = - g sin θ - μ g cosθ
a=- 10( sin4º - 0.7 cos4º)
a= - 6.28 m/s²
b)
For wet concrete
μ = 0.34
a = - g sin θ - μ g cosθ
a=- 10( sin4º - 0.34 cos4º)
a= - 4.08 m/s²
c)
For ice
μ = 0.1
a = - g sin θ - μ g cosθ
a=- 10( sin4º - 0.1 cos4º)
a= - 1.69 m/s²