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Tasya [4]
3 years ago
10

2. Which of the following is an example of work being done on an object? A prism scatters ultraviolet light into visible light.

A box rests on the floor. A man pushes a couch across the room. Water in a pot changes into steam
Physics
2 answers:
Liula [17]3 years ago
7 0
A man pushes a couch across the room is the answer!

SCORPION-xisa [38]3 years ago
7 0
The answer is the man pushing the couch against the floor because he is using his force to move an object. If I understood the question correctly, and I think I did. Then the answer must be C
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Farmer Tamar airlifted her sheep from 1000 meters to 1,200 meters
attashe74 [19]

Question

What was the change in potential energy of the sheep?

Answer:

1962(m) J

Explanation:

Potential energy is given by

PE=mgh

Change in potential energy is given by

∆PE=mg(h2-h1)

Where ∆PE is the change in potential eneegy, g is acceleration due to gravity, h2 is final height and h1 is the initial height.

Substituting 9.81 m/s² for g, 1200 m for h2 and 1000 m for h1 then

∆PE=m*9.81(1200-1000)=1962m Joules

Since we are not given the mass of rhe sheep, the answer will be 1962(m) Joules

4 0
3 years ago
A simple pendulum 2 m long swings through a maximum angle of 30 ? with the vertical.
Alexus [3.1K]
The complete question was calculate the period T assuming the smallest amplitude.
Using the equation;
T = 2 π√(L/g)
Where T is the period in seconds, L is the length of the rod or wire in meters and g is the acceleration due to gravity. 
Hence; T = 2×3.14 × √(2/9.81)
                = 6.28 × 0.4515
                = 2.836 seconds
6 0
3 years ago
A soccer ball was kicked. It had the mass of .42 kg and acceleration at 25m/s. what was the force?
maw [93]
Force of the kick or the balls velocity
4 0
3 years ago
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8 0
3 years ago
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Calculate the mass of an asteroid moving at 500 m/s moving with 125,000 kgm/s of momentum.
soldi70 [24.7K]

Answer:

M = 250kg

Explanation:

Ft = M x V

Where ft = momentum

M = mass

V = velocity

Given

Ft = 125,000 kgm/s

V = 500m/s

Therefore

125000 = M x 500

Divide both sides by 500

125000/500 = M x 500/500

250 = M

M = 250kg

4 0
3 years ago
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