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3 years ago

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Physics

2 answers:

PSYCHO15rus [73]3 years ago

8 0

Answer:

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Explanation:

Rudiy273 years ago

7 0

Answer:

Ok I might!

Explanation:

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he acceleration due to gravity on the surface of Mars is about one third the acceleration due to gravity on Earth’s surface. The

Ahat [919]

1/3 the weight than it is on earth

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4 years ago

Inessa05 [86]

Savings account is where she can have access to her money anytime in case of an emergency.

<h3>What is a Savings account?</h3>

This is a type of account run by a financial institution which yields interests on deposits made.

This type of account usually comes with features in which the money can be withdrawn via an ATM card or by visiting the bank to collect it. This therefore makes it the most appropriate choice for Analisa.

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2 years ago

A child riding a bicycle at 5 meters per seconds accelerates at 2.0 meters per second for 4.0 seconds. What is the child's speed

slega [8]

Explanation:

Using Kinematics,

We have v = u + at.

=> v = (5m/s) + (2.0m/s²)(4.0s)

=> v = 13m/s.

Hence the child's speed is now 13m/s.

5 0

3 years ago

A ball is projected at an immovable wall with a speed vi and bounces back the wall in such a manner that it only has 1/3 of its

sergey [27]

The fraction of the kinetic energy of the ball lost during the collision is $\frac{1}{3}$ .

The given parameters;

<em>initial speed of the ball, = vi</em>
<em>final momentum of the ball, Pf = ¹/₃Pi</em>

The initial and final momentum of the ball is calculated as;

$P_i = m_ivi$

$P_f = m_fv_f = \frac{1}{3} m_iv_i$

The initial and final kinetic energy of the ball is calculated as;

$K.E_i = \frac{1}{2} m_iv_i^2 = \frac{1}{2} P_iv_i\\\\K.E_f = \frac{1}{2} m_fv_f^2= \frac{1}{2} (\frac{1}{3} P_iv_i)= \frac{1}{6} P_iv_i$

The change in the kinetic energy is calculated as;

$\Delta K.E = K.E_f - K.E_i \\\\\Delta K.E = \frac{1}{6} P_iv_i - \frac{1}{2} P_iv_i = \frac{1}{3} P_iv_i$

Thus, the fraction of the kinetic energy of the ball lost during the collision is $\frac{1}{3}$ .

Learn more here:brainly.com/question/18566218

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3 years ago

What does it mean for PE to be dependent on the reference level?

Anastasy [175]

Answer:

The potential energy of an object is the energy possessed by the object due to its position in a gravitational field.

Mathematically, it is given by:

$PE=mgh$

where

m is the mass of the object

g is the acceleration due to gravity at the location of the object

h is the height of the object

As we can see, the potential energy depends on the height of the object, h.

However, this height is relative, since it can be measured using different reference levels.

Generally, the reference level is taken to be the ground; so for example, an object located at the top of a cliff 40 m above the ground, has

h = 40 m

But this value is of course relative, since we can also take the reference level to be the top of the cliff, so in that case, we would have

h = 0

3 0

3 years ago