The two blocks of masses M and 2M shown above initially travel at the same speed v but in opposite directions. They collide and
1 answer:
Answer:
option B.
Explanation:
given,
Mass of the blocks 1 = M
Mass of the blocks 1 = 2 M.
initial speed of the block 1= v
initial speed of the block 2 = - v
where V is the final speed of the blocks after collision
using conservation of momentum
M v + 2 M (-v) = (M + 2 M) V
3 M V = - M v
velocity of the blocks after collision is equal to -v/3 m/s
hence, the correct answer is option B.
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Answer:
Capacitance is 0.572×10⁻¹⁰ Farad
Explanation:
Radius = R₁ = 6.25 cm = 6.25×10⁻² m
Radius = R₂ = 15 cm = 15×10⁻² m
Dielectric constant = k = 4.8
Electric constant = ε₀ = 8.854×10⁻¹² F/m
ε/ε₀=k
ε=kε₀
∴ Capacitance is 0.572×10⁻¹⁰ Farad
Answer:
V = 11.83 m/s
Explanation:
Given the following data;
Mass = 2000 kg
Force = 10000N
Distance = 14 m
To find the final velocity of the car;
First of all, we would determine the acceleration of the car;
Acceleration = force/mass
Acceleration = 10000/2000
Acceleration = 5 m/s²
Next, we would use the third equation of motion to find the final velocity;
Where;
V represents the final velocity measured in meter per seconds.
U represents the initial velocity measured in meter per seconds.
a represents acceleration measured in meters per seconds square.
S represents the displacement measured in meters.
Substituting into the equation, we have;
V² = 0² + 2*5*14
V² = 0 + 140
V = √140
V = 11.83 m/s