Larry drops a 5kg ball off of a building. The ball hits the ground 4.7s later. How tall is the building?
1 answer:
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Answer:
The value is
Explanation:
From the question we are told that
The voltage is
The current is
Generally the resistance value is mathematically represented as
=>
=>
Answer:
(a) 2.5 m/s
(b) 37.5 KJ
Explanation:
(a)
From the law of conservation of momentum, Initial momentum=Final momentum
and making
the subject then
and since
is initial velocity of car, value given as 4 m/s,
is the initial velocity of the three cars stuck together, value given as 2 m/s and
is the final velocity which is unknown. By substitution
(b)
Initial kinetic energy is given by
Final kinetic energy is given by
The energy lost is given by subtracting the final kinetic energy from the initial kinetic energy hence
Energy lost=350-312.5=37.5 KJ