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Brilliant_brown [7]
3 years ago
12

If an object is dropped from a tall building and hits the ground 3.0 s. later, what is the magnitude of the object's displacemen

t in 1.0 s.; in 2.0 s.?
Physics
1 answer:
Leni [432]3 years ago
3 0

4.9 m down

19.6 m down

(44.1 m down in 3 sec)

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How are balanced & unbalanced forces related to net force?
Levart [38]

Answer:

An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. ... A net force = unbalanced force. If however, the forces are balanced (in equilibrium) and there is no net force, the object will not accelerate and the velocity will remain constant.

Explanation:

4 0
3 years ago
When water waves form in the ocean, water is the
Helga [31]

Answer:

Amplitude

Explanation:

The amplitude of a periodic variable is a measure of its change over a single period. There are various definitions of amplitude, which are all functions of the magnitude of the differences between the variable's extreme values. In older texts the phase is sometimes called the amplitude.

6 0
3 years ago
Read 2 more answers
(Another tomato/skyscraper problem.) You are looking out your window in a skyscraper, and again your window is at a height of 45
Ivan

Answer:

1027.2 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 32.2 ft/s

s=ut+\frac{1}{2}at^2\\\Rightarrow u=\frac{s-\frac{1}{2}at^2}{t}\\\Rightarrow u=\frac{450-\frac{1}{2}\times 32.2\times 2^2}{2}\\\Rightarrow u=192.8\ ft/s

v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{192.8^2-0^2}{2\times 32.2}\\\Rightarrow s=577.20\ m

The height the tomato would fall is 450+577.2 = 1027.2 m

6 0
4 years ago
A particle moving at 10 m/s along the x-axis collides elastically with another particle moving at 5.0 m/s in the same direction
drek231 [11]

Explanation:

It is given that,

Velocity of particle 1, u₁ = 10 m/s

Velocity of particle 2, u₂ = 5 m/s

Let v₁ and v₂ are the final speed of both particles after the collision. Applying the conservation of momentum as :

mu_1+mu_2=mv_1+mv_2

15=v_1+v_2......................(1)

For an elastic collision, the coefficient of restitution is equal to 1 as :

\dfrac{v_2-v_1}{u_1-u_2}=1

\dfrac{v_2-v_1}{5}=1

{v_2-v_1}=5................(2)

On solving equation (1) and (2), we get,

v_1=5\ m/s

v_2=10\ m/s

So, the speeds of particle 1 and particle 2 after the collision is 5 m/s and 10 m/s respectively. Hence, this is the required solution.

8 0
4 years ago
A shopping cart is initially at rest when it undergoes a constant acceleration. After
Luba_88 [7]
The answer is A.3.3 m/s2
4 0
3 years ago
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