Answer:
6 m/s
Explanation:
mass of moving car m1=5000 kg
initial velocity of moving car vi1=?
mass of car at rest = m2=10000 kg
initial velocity of car at rest = vi2=0
final velcoities of both cars after collision = vf1=vf2= 2m/s
using conservation of momentum rule
m1vi1+m2vi2=m1vf1+m2vf2
putting values
==> 5000 × vi1 + 1000 × 0 = 5000 × 2 + 10000 × 2
==> 5000 ×vi1 = 2 × 15000
==> vi1 = 2 × 15000 ÷ 5000
==> vi1= 2×3=6 m/s
Answer:
The dart with the small mass will travel the farthest distance.
Explanation:
Acceleration is proportional to force times mass, and inertia is proportional to mass. Inertia is the reluctance of a moving body to stop, and a stationary body to start moving (inertia increses with mass). Assuming they both have the same aerodynamic design, and that they are both launched with the same force applied for the same time duration, the dart with less small mass will accelerate faster than the big mass dart. From this we can see that the small dart will have covered a longer distance before the effect of the force stops, when compared to the more massive dart.
It would be 12,000 because newton’s third 2nd law states F=ma (force=matter x acceleration) so 30x400 would be your force .
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Answer:
Here ball and rod will repel each other as they are of similar charges
Explanation:
As we know that the two charges attract or repel each other by electrostatic force
This force is given as
so we know if two charges are similar in nature then they will repel each other and if the two charges are opposite in nature then they will attract each other
So here when rod touch the ball then it transfer its charge to the ball and due to similar charges in ball and rod they both repel each other
