Find the kinetic energy of a block twice as massive (20kg) moving at the same speed
1 answer:
10v²
Explanation:
Given parameters:
Mass of block(twice) = 20kg
Unknown:
Kinetic energy = ?
Solution:
Kinetic energy is the energy due to the motion of a body.
K.E = mv²
m is the mass of the body
v is the velocity of the body
since the velocity in this problem is unknown, let velocity be represented by v.
Mass of the block = 10kg
K.E = x 10 x v² = 5v²
This is the kinetic energy for the 10kg block which is half of the 20kg mass given;
If the mass is doubled, the kinetic energy will be doubled;
therefore, the kinetic energy is:
K.E = 2( 5v²) = 10v²
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Kinetic energy brainly.com/question/6536722
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Answer:
Total momentum = 50kgm/s
Explanation:
<u>Given the following data;</u>
Mass, M1 = 5kg
Mass, M2 = 7kg
Velocity, V1 = 10m/s
Velocity, V2 = 0m/s (since it's at rest).
To find the total momentum;
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.
Total momentum = M1V1 + M2V2
Substituting into the equation, we have;
Total momentum = 5*10 + 7*0
Total momentum = 50 + 0
<em>Total momentum = 50 kgm/s</em>
<em>Therefore, the total momentum of the bowling ball and the putty after they collide is 50 kgm/s. </em>