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astraxan [27]
3 years ago
15

Pwease help me with thesse three

Physics
1 answer:
DiKsa [7]3 years ago
7 0

Answer:

1. Spring

2. 23.5

3. Summer

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zheka24 [161]

Answer:

The answer's A - 3m

Explanation:

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4 years ago
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A new ride being built at an amusement park includes a vertical drop of 126.5 meters. Starting from rest, the ride vertically dr
Readme [11.4K]

Answer:

Speed at the bottom of the roller coaster = 49.79 m/s

Explanation:

A new ride being built at an amusement park includes a vertical drop of 126.5 meters. Starting from rest, the ride vertically drops that distance before the track curves forward.

We have to find the speed at the bottom.

Here the gravitational energy fully converts to kinetic energy, so we equate it.

Gravitational energy = m\times g\times h

Kinetic energy = 0.5 \times m\times v^{2}

m\times g\times h = 0.5 \times m\times v^{2}

9.8\times 126.5 = 0.5\times v^{2}

v^{2} = 2479.4

Velocity, v = 49.79 m/s

7 0
3 years ago
A 10N force and a 50N force act in opposite directions on a 4 kg object. What is the acceleration? ( how did you do it )
Anastaziya [24]

To find the acceleration, we will use the formula

F=ma

Here the net force will be 40N (50 - 10)

F = ma

40 = 4a

40/4 = a

10 m/s^2 = a

Hope you understood !

3 0
4 years ago
An athlete stretches a spring an extra 40.0 cm beyond its initial length. how much energy has he transferred to the spring, if t
marissa [1.9K]
The energy transferred to the spring is given by:
U= \frac{1}{2}kx^2
where 
k is the spring constant
x is the elongation of the spring with respect its initial length

Let's convert the data into the SI units:
k=52.9 N/cm = 5290 N/m
x=40.0 cm=0.4 m

so now we can use these data inside the equation ,to find the energy transferred to the spring:
U= \frac{1}{2}kx^2= \frac{1}{2}(5290 N/m)(0.4m)^2=423.2 J
4 0
3 years ago
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