Acceleration is the change in velocity over time. Given this information, is acceleration a vector or a scalar quantity? Explain
1 answer:
Answer:
Vector quantity.
Explanation:
Acceleration is defined as the rate of change in the value of velocity with the time change.
Acceleration can be defined by the second law of newton in which the acceleration is produce due to the net force.
The SI unit of acceleration is .
The acceleration follow all the law of vector addition, whether parallelogram law of addition as well as triangular law of vector addition.
Therefore, by the above discussion we can define that the acceleration is a vector quantity.
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Answer:
R = 4.24 x 10⁻⁴ m
Explanation:
given,
mass of the person = 60.3-kg
mass of the bullet = 10 gram = 0.01 Kg
velocity of bullet = 389 m/s
angle made with the horizontal = 45°
using conservation of momentum.
M v + m u = ( M + m ) V
60.3 x 0 + 0.01 x 389 = (60.3 + 0.01) V
V = 0.0645 m/s
for calculation of range
R = 4.24 x 10⁻⁴ m
the distance actor fall is R = 4.24 x 10⁻⁴ m
Answer:
Option C
100 J
Explanation:
Kinetic energy, KE is given by
where m is the mass and v is the velocity
Substituting 50 Kg for mass, m and 2 m/s for velocity v then we obtain
Therefore, the child's kinetic energy is equivalent to 100 J