My answer to the problem is as follows:
<span>1. Use the kinematic formula
Vf = Vi + a*t
for a, Vi = 3.0 m/s, a = 0.5 m/s/s, and t = 7.o s.
for b, Vf = 0, Vi = 3.0 m/s, and a = -0.60 m/s/s.
I hope my answer has come to your help. God bless and have a nice day ahead!
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Answer:
C. 180 N
Explanation:
= mass of the blocking sled = 60 kg
= Coefficient of kinetic friction = 0.30
= kinetic frictional force acting on the sled
kinetic frictional force acting on the sled is given as

=Force applied
For the sled to move at constant speed, the applied force must be same as the frictional force

Answer:
540 nm
Explanation:
According to the question,
The refractive index of the soap bubble,
.
The thickness of the soap bubble wall is,
.
Now, for constructive interference of soap bubble.
.
Now for first order m=1.
Therfore,

Substitute all the variables in the above equation.
.
Therefore,
.
Therefore the visible light wavelength which is strongly reflected is 540 nm.
Answer:
100 m/s
Explanation:
Mass the mass of Bond's boat is m₁. His enemy's boat is twice the mass of Bond's i.e. m₂ = 2 m₁
Initial speed of Bond's boat is 0 as it won't start and remains stationary in the water. The initial speed of enemy's boat is 50 m/s. After the collision, enemy boat is completely stationary. Let v₁ is speed of bond's boat.
It is the concept of the conservation of momentum. It remains conserved. So,

Putting all the values, we get :

So, Bond's boat is moving with a speed of 100 m/s after the collision.
All of the above. They all right