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Andrei [34K]
3 years ago
10

There are two equations from which a change in the gravitational potential energy u of the system of a mass m and the earth can

be calculated. one is
Physics
1 answer:
Colt1911 [192]3 years ago
5 0
The change in the gravitational potential energy is represented by the equation
u = ΔPE = Δmgh
since the mass of the system will remain constant and the acceleration due to gravity will also remain constant, the equation will become
u = mg Δh
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how does distance change when the amount of effort force is increasesd while the amount of work done remains the same?
nlexa [21]
Could you supply u with some answer choices please?
8 0
4 years ago
A mass of 0.30kg is attached to a spring and is set into motion with a period of 0.24s. what is the spring constant of the sprin
Alenkinab [10]

Answer:

The spring constant of the spring is 205.42 N/m.

Explanation:

Springs have their own natural "spring constants" that define how stiff they are. The letter k is used for the spring constant, and it has the units N/m.

                                                         k = -F/x

The period of a spring-mass system is proportional to the square root of the mass and inversely proportional to the square root of the spring constant.

Given:

mass of object in SHM = m = 0.30 kg

Time period of the spring mass system = 0.24s

Spring constant = k ?

Finding 'k' using Time period 'T':

We know that  

6 0
3 years ago
Science Question please help
topjm [15]

Answer:

1.29 s

Explanation:

Given:

Δy = 1.40 m

v₀ = 0 m/s

a = 1.67 m/s²

Find: t

Δy = v₀ t + ½ at²

(1.40 m) = (0 m/s) t + ½ (1.67 m/s²) t²

t = 1.29 s

8 0
3 years ago
The thickness of a book is 3.2cm, measured between the inside covers the highest level of page is 1096 what order of magnitude e
Naddik [55]

Answer:

Magnitude of Thickness has order of 2.919 × 10^{-5} m

Explanation:

Thickness of book is 3.2 cm.

Number of pages in the book is 1096.

Thickness of 1096 pages is 3.2 cm.

Thus, thickness of 1 page is \frac{3.2}{1096} cm

Thickness of 1 page of book is 0.002919 cm

Magnitude of Thickness has order of 2.919 × 10^{-5} m


4 0
3 years ago
A child bounces a 48 g superball on the sidewalk. The velocity change of the superball is from 28 m/s downward to 17 m/s upward.
Aliun [14]

Answer:

F = 1.2×10⁻³ N

Explanation:

From the question,

Applying newton's second law of motion,

F = m(v-u)/t................... Equation 1

Given: F = magnitude of the average force exerted on the ball, m = mass of the ball, v = final velocity, u = initial velocity, t = time of  contact.

Note: let downward be negative and upward be positive.

Given: m = 48 g = 48/1000 = 0.048 kg, v = 17 m/s, u = -28 m/s (downward),

t = 1800 s

Substitute into equation 1

F = 0.048(17-[28])/1800

F = 1.2×10⁻³ N

7 0
3 years ago
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