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kondaur [170]
4 years ago
5

A boy pushes a box with a horizontal force across a rough surface. He then changes the direction of his force to be diagonal int

o the ground. He pushes with the same force as before. Give two reasons as to why this would not be a very good way to push the box.
Physics
1 answer:
N76 [4]4 years ago
5 0

Explanation:

  1. The box is going to scrape on the ground
  2. the Box will be harder to push
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Voltage is necessary for charge to flow


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4 years ago
Read 2 more answers
A metal ball attached to a spring moves in simple harmonic motion. The amplitude of the ball's motion is 11.0 cm, and the spring
german

Answer:

a)0.674 kg b) 2.2 s c) 0.9 m/s²

Explanation:

The amplitude of the ball (xo) = 11.0cm, half way between its equilibrium point its maximum displacement x = 11 cm / 2 = 5.5 cm = 5.5 / 100 in meters = 0.055 meters, speed at this point = 27.2 cm /s = (27.2 / 100) in m/s = 0.272 m/s,

spring constant K = 5.5 N/m

a) The mass of the ball (m) can be calculated using the formula below

v =√ (x²o - x²)K/m

make m subject of the formula

v² = (xo² - x²) K/m

m = K ( xo² - x²) / v²

m = 0.674kg

b) The period of the oscillation can be calculated by the following formula

T = 2π√ (m /K)

substitute the values into the formula

T = 2 × 3.142 × √ (0.674/ 5.5) = 2.2s

c) The maximum acceleration of the ball which occurs at the maximum displacement of the ball can be calculated by the following formula

a = K / m × x ( maximum displacement of the body) = 5.5 / 0.674 × 0.11 = 0.9 m/s²

7 0
3 years ago
Which chemical reaction is most likely the slowest?
NemiM [27]
B. takes the longest!
8 0
3 years ago
14. The real risk-free rate of interest is 2%. Inflation is expected to be 3.5% the next 2 years and 6% during the next 3 years
Naddika [18.5K]

Answer:

3-year = 6.33%

5-year = 7%

Explanation:

Yield in security = Risk free rate + Maturity risk premium + Inflation premium + Liquidity premium + Default risk premium

Maturity risk premium is given as 0

Yield on 3-year treasury securities is 2 + [(3.5 + 3.5 + 6) / 3] + 0

= 6.33%

Yield on 5-year treasury securities is 2 + [(3.5 + 3.5 + 6 + 6 + 6) / 5] + 0

=7%

5 0
4 years ago
What does this mean?
Alexeev081 [22]
Well, in some systems the atoms melt or burn or change state like from liquid to gases when they reach a certain temperature. This could decrease the energy in the system.
Hope I helped
3 0
4 years ago
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