What to forces effects the momentum of an object

Physics

2 answers:

noname [10]2 years ago

7 0

<span>Any force can affect the momentum of an object</span>

faltersainse [42]2 years ago

4 0

Any force can affect the momentum of an object
if it changes the object's speed.

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A dart gun shoots a dart with an angle of 45' above horizontal During the upward part of the trajectory the gravitational accele

ludmilkaskok [199]

Answer:

4. Downward and its value is constant

Explanation:

As this is a case of projectile motion, we use the reference frame where upward direction to be positive for $y$ , and in the same way to be negative in the downward direction. On another hand, we have that gravity is always acting this means that gravitational acceleration g is directed downward constantly over the dart not only during the upward but also during the downward part of the trajectory. And it is ruled by the following equations.

For the x-axis

$v_{x}=v_{0}cos(45\°)=constant$

$x=(v_{0}cos(45\°))t$

For the y-axis

$v_{y}=v_{0}sin(45\°)-gt$

$y=v_{0}sin(45\°)t-\frac{1}{2} gt^{2}$

Where $v_{0}$ , is the initial velocity.

8 0

2 years ago

Can someone help me with #7

bekas [8.4K]

The ratio of (new volume / old volume) is the same as the ratio of (new temperature / old temp).

Just remember that you have to use the ABSOLUTE temperatures.

An absolute temperature is (Celsius + 273).

7 0

3 years ago

A ball is thrown horizontally from the top of a 73.9-m building and lands 183 m from the base of the building. Ignore air resist

user100 [1]

Answer:

t = 3.88 seconds

Explanation:

Given that,

A ball is thrown horizontally from the top of a 73.9-m building and lands 183 m from the base of the building.

We need to find the time for which the ball is in air. Let the time be t.

$y=y_o+ut+\dfrac{1}{2}at^2$