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RSB [31]
4 years ago
11

how long does it take an acorn to hit the ground after dropping from the branch of a tree 12.5 m high?

Physics
1 answer:
Grace [21]4 years ago
6 0
The right formula to use is: T^2= 2d/g
where T= time taken
d = 12.5m
g = is a constant and is equal to 9.8m/s
therefore, T^2 = 2*12.5/9.8 
Using the values above, the time taken for the acorn to reach the ground is 1.59 second
T = 1.59 S
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29.5 days!

Explanation:

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A 620 kg car is traveling at 24 m/s on horizontal ground when it starts up a 30 m high hill. The engine can produce up to 144,00
sweet-ann [11.9K]

Answer:

The kinetic energy of the car at the top of the hill is 140280 Joules.

Explanation:

Mass of the car, m = 620 kg

Speed of the car, v = 24 m/s

Height of the hill, h = 30 m

The engine can produce up to 144,000 J of work during that time, W = 144,000 J

We need to find the kinetic energy of the car at the top of the hill. It can be calculated using conservation of mechanical energy as :

(mgh+K)-\dfrac{1}{2}mv^2=144000

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So, the kinetic energy of the car at the top of the hill is 140280 Joules. Hence, this is the required solution.

7 0
4 years ago
During a tug-of-war, team A pulls on team B by applying a force of 1550 N to the rope between them. The rope remains parallel to
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Answer:

3565 J

Explanation:

F = Force applied = 1550 N

s = Displacement caused by the applied force = 2.3 m

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When we multiply force, displacement and the angle at which the force is applied we get work

Work done is given by

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Answer number 76 please
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3 years ago
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fomenos

Answer:

400

Explanation:

Formula used in solution:

P = \frac{F}{A}

P - pressure,\: F - force,\:  A - area

The given information:

F = 20N

A = 0.05m^{2}

Solution

P = \frac{F}{A} = \frac{20}{0.05} = 20 * 20 = 400

Answer:

Pressure = 400 \: Pascals

8 0
3 years ago
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