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vredina [299]
3 years ago
13

How much work was done on a 45 kg weight when lifted 1.4 meters in the air?

Physics
1 answer:
BabaBlast [244]3 years ago
8 0

Explanation:

w = f x d

45 x 1.4 = 630j

to get newton's do 45 x gravitation field strength

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3 years ago
Batman (mass = 96.1 kg) jumps straight down from a bridge into a boat (mass = 458 kg) in which a criminal is fleeing. The veloci
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Answer:

The velocity of the boat after the batman lands in it is +9.26 m/s

Explanation:

Applying the law of conservation of momentum,

Total momentum before collision = Total momentum after collision.

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m'u'+mu = V(m+m').................... Equation 1

Where m' = mass of the Batman, u' = initial velcoity of the batman, m = mass of the boat, u = initial velocity of the boat, V = common velocity.

make V the subject of equation 1

V = (m'u'+mu)/(m+m')............... Equation 2

Given: m' = 96.1 kg, u' = 0 m/s, m = 458 kg, u = +11.3 m/s.

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V = 5129.6/554.1

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8 0
3 years ago
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