Answer:
441.45N
Explanation:
Weight = mass(kg) x acceleration (m/s^2)
Weight = 45kg x 9.81m/s^2=441.45N
Recall that weight =mass of the rock x gravitational force acting on the rock
Therefore, the rock will weigh = 441.45N
momentum = mass * velocity
62.5 = mass * 3.6
mass = 62.5/3.6
mass = 17.36 kg
Answer:
It does not indicate the car's direction. Since velocity is both magnitude and direction, the speedometer measures speed but does NOT measure velocity
Answer:
We must duplicate the length of the rope (R'=2R) to get

Explanation:
The equation of the centripetal force is given by:


Where:
R is the length of the rope
m is the mass of the object
v is the speed of the object
If we want to reduce the centripetal force in half, we can duplicate the length of the rope (R'=2R), which means:



I hope it helps you!