Question

All Physicsts over here plz help in these questions!!!!!!!!!

Answer 1

Hello!

First one we can use that PE=mgh so we have

4.37*10^5J/(9.12*10^3kg*9.80m/s^2)= 4.89m

Second one we can use Newton’s Second Law
F=ma and in this case F=mg so we have

g= 3.28*10^-2N/6*10^-3kg = 5.47m/s^2

Hope this helps. Any questions please ask. Thank you.

Answer 2

1. Answer: Height = 4.8 m

Gravitational potential energy, $P.E. = mgh$

where, m is mass of the body, g is the acceleration due to gravity and h is the height.

It is given that, location is on Earth.

$P.E. =4.37\times 10^5 J\\ m=9.12 \times 10^3 kg\\ g=9.8 m/s^2$

$\Rightarrow h=\frac{P.E.}{mg}=\frac{4.37\times 10^5 J}{9.12 \times 10^3 kg \times 9.8 m/s^2}=4.8 m$

2. Answer: $5.46m/s^2$

Weight is a force which an object exerts due to its mass under gravity.

weight = mass × acceleration due to gravity

⇒ acceleration due to gravity = weight/ mass

It is given that the weight, $w= 3.28\times 10^{-2} N$

mass of the object, $m=6\times 10^{-3} kg$

$\Rightarrow a=\frac{w}{m}=\frac{3.28\times 10^{-2} N}{6\times 10^{-3} kg}=5.46 m/s^2$