The force of earth gravity on the space craft is 1.19 N
\begin{array}{c}
F = \frac{{GMm}}{{{{\left( {r + h} \right)}^2}}}\\
= \frac{{6.67 \times {{10}^{ - 11}} \times 6 \times {{10}^{24}} \times 1050}}{{{{\left( {\left( {6400 + 12800} \right) \times {{10}^3}} \right)}^2}}}\\
= 1.139\;{\rm{N}}
\end{array}$
Hence, the force of gravity on the space craft is 1.19 N.
C.) Friction.
Reason:
No force is opposing the motion of an object except frictional force. Hence an object requires 15 N of force to set an object in motion and is greater than friction. Hope this helps, have a great day ahead!
Answer:
The rate of current change in the circuit is
Explanation:
From the question we are told that
The capacitor has a value
The inductor has a value
The capacitors voltage is at t = 0s
The new capacitor voltage is
Generally when the switch is closed the potential across the inductor is equal to the potential across the capacitor
So for the inductor
rate of current change is given as
Where is the voltage across the inductor.
Substituting value
Speed of ball is 19.80 m/s .
<u>Explanation:</u>
We have , a 2.0 kg ball is resting at the top of a 20 m hill. if the ball rolls down the entire hill,We need to find how fast will it be going.Let's find out:
We know that,
Potential energy : This is the energy possessed by an object due to it's virtue of height and is given by , where m is mass , g is acceleration due to gravity & h is height !
Kinetic energy : This is the energy possessed by an object due to it's virtue of motion and is given by , where m is mass & v is the velocity of object !
By conservation of energy :
⇒
⇒
⇒
According to question , h=20 m i.e.
⇒
⇒
⇒
Hence , Speed of ball is 19.80 m/s .
Answer:
Negative
Explanation:
If a negatively charged object is used to charge a neutral object by induction, then the neutral object will acquire a positive charge. And if a positively charged object is used to charge a neutral object by induction, then the neutral object will acquire a negative charge:
We have a neutral sphere
1) Electrons are attracted to the positive charge
2) Electrons enter the sphere from ground, attrated to the + charge in the sphere
3) The sphere has an excess of e- having entered from the ground
4) Electrons redistribute uniformly