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lukranit [14]
3 years ago
15

A 3.0-kg mass moving in the positive x direction with a speed of 10 m/s collides with a 6.0-kg mass initially at rest. after the

collision, the speed of the 3.0-kg mass is 8.0 m/s, and its velocity vector makes an angle of 35° with the positive x axis. what is the magnitude of the velocity of the 6.0-kg mass after the collision?
Physics
1 answer:
OverLord2011 [107]3 years ago
6 0
Sorry i dont know the answer 
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A string under a tension of 68 N is used to whirl a rock in a horizontal circle of radius 3.7 m at a speed of 16.53 m/s. The str
alekssr [168]

Answer:

F = 5253.7 N

Explanation:

As we know that tension force in the string will be equal to the centripetal force on the string

so we will have

T = \frac{mv^2}{L}

now we have

68 = \frac{m(16.53^2)}{3.7}

now we have

68 = 73.8 m

m = 0.92 kg

now when string length is 0.896 m and its speed is 71.5 m/s then we will have

F = \frac{mv^2}{r}

F = \frac{0.92(71.5^2)}{0.896}

F = 5253.7 N

8 0
3 years ago
Read 2 more answers
An object must move in the (same or different) direction as the force is being applied.
Marta_Voda [28]

Answer:

only reason an object will move in a different direction to the net force on it is because of its prior momentum and it will always accelerate in the direction of the force if thats what u mean.. lol

Explanation:

7 0
2 years ago
One thousand grams of seawater would consist of how many grams of dissolved substances? 65 635 35 965
Naya [18.7K]
<span>One thousand grams of seawater has 35 grams of dissolved substances ... on the average. While the salinity of the Earth's oceans and seas varies, the average salinity of seawater rests at 3.5%. Consider one liter or sea or ocean water. One liter has 1,000 milliliters (mL) in it. To find 3.5% of 1,000, we would multiply with the decimal place adjusted for percentages: 1000 x .035 = 35. Therefore, for every 1,000 mL of seawater, we will find 35 grams of (mostly) sodium chloride, otherwise known as salt.</span>
7 0
3 years ago
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Potential energy is the energy an object has because of its __________.
jasenka [17]

Answer:

option D

Explanation:                                    

The correct answer is option D  

Potential energy of an object is because of its location.

 Expression of potential energy      

     P E = m g H                                  

where H is the height of the object.            

           g is acceleration due to gravity, 9.8 m/s²

           m  is the mass of the object.          

Potential energy is directly proportional to the location of the object.    

If the height of the object is more than the potential energy of the object will also increase.                                      

4 0
3 years ago
What happens to the volume of a solid when it is moved to a larger container?
Goryan [66]
Remains unchanged (as it's a solid)
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3 years ago
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