Answer:
t = 1.16 s.
Explanation:
Given,
speed of conveyor belt, v = 3.2 m/s
coefficient of friction,f = 0.28
Using newton second law
f = ma
and we also know that frictional force
f = μ N
f = μ m g
equating both the force equation
a = μ g
a = 0.28 x 9.81
a = 2.75 m/s²
Using Kinematic equation
v = u + at
3.2 = 0 + 2.75 x t
t = 1.16 s.
Time taken by the box to move without slipping is 1.16 s.
exothermic
Explanation:
negative means it's losing energy
F=mgsinα –F(fr)=
= mgsinα - μmgcosα
a=F/m =g(sinα – μcosα)
=9.8(sin14-0.57•cos14)= -3.04 m/s²
v²=v₀²+2ad
v=sqrt{ v₀²+2ad} =
=sqrt{18²+2• (-3.04) •25}=13.1 m/
Answer:
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Answer:
3. Kinetic energy of the system is maximum when potential energy is minimum.
Explanation:
Given that
Mass of block= m
Spring constant =K
Table is friction less.
As we know that in oscillatory motion ,when kinetic energy is maximum then potential energy will become minimum.
At the mean position:
Kinetic energy is maximum.
Potential energy is minimum.
At the extreme position:
Kinetic energy is minimum.
Potential energy is maximum.
At the mean position velocity of block will be maximum that is why it have maximum kinetic energy and at the extreme position the velocity of block will be minimum that is why it have minimum kinetic energy.
So from above we can say that kinetic energy of the system is maximum when potential energy is minimum.
