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Travka [436]
4 years ago
6

A constant force of 2.0 N is used to push a box 4.0 m across the floor. How much work is done?

Physics
1 answer:
nadya68 [22]4 years ago
6 0

Answer:

8 J

Explanation:

Given : Force = 2 N

            Distance = 4m

Work done = force * distance

Work done = 2 * 4 = 8 J

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A cat jumps off a table which is 1.5 m high. If the initial velocity of the cat is 10 m/s, at an angle of 37 degrees above the h
Black_prince [1.1K]

Answer:

11.5 m

Explanation:

First, find the time it takes to land.

Given:

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a = -9.8 m/s²

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Δy = v₀ t + ½ at²

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-1.5 = 6.02 t − 4.9 t²

4.9 t² − 6.02 t − 1.5 = 0

Solve with quadratic formula:

t = [ -(-6.02) ± √((-6.02)² − 4(4.9)(-1.5)) ] / 2(4.9)

t = 1.44

Now find how far it moves horizontally in that time:

Given:

t = 1.44 s

v₀ = 10 cos 37° m/s

a = 0 m/s²

Find: Δx

Δx = v₀ t + ½ at²

Δx = (10 cos 37° m/s) (1.44 s) + ½ (0 m/s²) (1.44 s)²

Δx = 11.5 m

The cat lands 11.5 meters from the table.

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3 years ago
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Answer:

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A busy chipmunk runs back and forth along a straight line of acorns that has been set out between its burrow and a nearby tree.
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Answer:

0.59 seconds

Explanation:

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