A car travels north for 20 km. The car then travels south for 35 km.
1 answer:
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Answer:
t = 106π / 30*2.1
Explanation:
=> 106
=> 106 x 2π/60
=> 106/30π
∝ = -2.1 rad/sec²
=> 0
=
+ ∝t
∴ ( -
) / ∝ = t
t = 106π / 30*2.1
Answer:
Velocity is 1.73 m/s along 54.65° south of east.
Explanation:
Let unknown velocity be v, mass of billiard ball be m and east direction be positive x axis.
Here momentum is conserved.
Initial momentum = Final momentum
Initial momentum = m x 2i + m x (-1)i = m i
Final momentum = m x v + m x 1.41 j = mv + 1.41 m j
Comparing
mi = mv + 1.41 m j
v = i - 1.41 j
Magnitude of velocity
Direction,
Velocity is 1.73 m/s along 54.65° south of east.