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lisabon 2012 [21]
3 years ago
13

A block of mass 22 kg is sliding along the ice at constant speed 5.0 m/s just ahead of it is q block of mass 29 kg sliding in th

e same direction at constant speed 4.6 m/s when the two blocks collide,the 29-kg block travels at a new speed of 7.2 m/s what is the new speed of the 22-kg block?
Physics
1 answer:
mars1129 [50]3 years ago
8 0

Answer:

Answer:

New speed of the 22-kg block is 1.57 m/s

Explanation:

Mass of block  

Mass of another block  

Initial speed of the block  

Initial speed  of the another block  

Initial speed  of the another block  

For conservation of momentum, we have

Substitute all the values and solving for final speed of the 22kg block is

new speed of the 22-kg block is 1.57 m/s

Couldnt write the answer so check picture

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A motorcycle is moving at a speed of 21 m/s. The driver applies the brakes, giving hum an acceleration of -2.4 m/s^2. After 2 se
WARRIOR [948]
<h3><u>Answer;</u></h3>

B. 16.2 m/s

<h3><u>Explanation</u>;</h3>

Using the equation;

v = u + at; where v is the final velocity, u is the initial velocity, a is the acceleration and t is the time taken;

u = 21 m/s, a= -2.4 m/s^2 and t = 2 seconds

Therefore;

v = 21 + ((-2.4) × 2)

  = 21 - 4.8

 <u> = 16.2 m/s</u>

6 0
3 years ago
A car, travelling at constant speed on a straight, level road, accelerates so that its speed is now doubled. By what factor will
Anettt [7]

Answer:

We know that, the kinetic energy

ke=  \frac{1 }{2} m{v}^{2}  

and we also know that the acceleration causes the speed's value to be doubled

Hence, v becomes 2v

When 2v is squared, it becomes 4v^2. After substituting this value in the equation above and comparing it,

We can conclude that the Kinetic Energy has increased

by a factor of 4

4 0
3 years ago
Which of the following terms is the best described as the number of waves that pass a point in one second
sammy [17]

Thinking it would be Wave frequency 1 wave per second =1 Hertz

3 0
3 years ago
Gravitational force on the moon is only 1/6 that of the gravitational force on earth. what would be the weight of a 10-kg object
MA_775_DIABLO [31]
According to Newton's Second Law of Motion, the force is equal to the mass of an object multiplied by its acceleration. When you talk about gravitational force, the acceleration referred to here is the acceleration due to gravity. This is very familiar to us in physics. The acceleration due to gravity on Earth is equal to 9.81 m/s². It actually depends on the location. According to the Universal Law of Gravitation:

F = Gm₁m₂/d²

The force is a factor of the product of two masses and their distance from each other. The G is a constant called the universal gravitational constants. So, gravitational force is actually a relative force exerted by one body to another. 

Going back the Second Law of Motion, we can modify the equation to:

F = mg

Since it is mentioned that the gravity on the moon is only 1/6 of the Earth, then the gravity for moon is:
g,moon = 1/6(9.81) = 1.635 m/s²
So, let's compare the weight of the object with a mass of 10 kg. The weight is actually the force due to gravity pulling you towards the center of the body.

Weight on Earth = (10 kg)(9.81 m/s²) = 98.1 N
Weight on Moon = (10 kg)(1.635 m/s²) = 16.35 N

The mass, on the other hand, is not affected by gravity. It is always constant. Therefore, the mass of the object on the moon is the same with its mass on the Earth.
6 0
3 years ago
A cow is given a growth hormone and then compared to another cow that was not given a growth hormone. Both cows were weighed at
igomit [66]

The complete question is as follows:

A cow is given a growth hormone  and then compared to another cow that  was not given a growth hormone. Both  cows were weighed at 2 years. What is the independent variable?

if the cow is given growth hormone or not  

weight of the cow

same cows  

type of growth hormone

Answer:

The correct answer is - if the cow is given growth hormone or no

Explanation:

The independent variable is here is if the growth hormone is given or not as the variable which is subject to change or manipulated during an investigation and affects the dependent variable is known as the independent variable.

Due to this independent variable manipulation the weight of the cows might be different which makes the weights as the dependent variable.

7 0
3 years ago
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