Update: part A was: Use conservation of energy to calculate the linear speed of the yo-yo just before it reaches the end of its 1.5 m long string, if it is released from rest. v=1.2 m/s.Follow.e know linear KE=1/2*m*v^2 and rotational KE=1/2*I*w^2 where I is the moment of inertia and in this case it is I=mr^2. So....
We always recommend having at least a couple of thousand pounds of towing capacity in excess of what your trailer weighs, and our 4,300-pound test trailer was probably a fair representation of what people will be towing with a Grand Cherokee.
Braked towing capacity refers to the maximum amount a vehicle is able to tow when the trailer that is in tow possesses its own individual braking system. In this instance, the trailer will usually be connected to the braking system of the vehicle through a trailer cable. Unbraked towing capacity refers to the capacity of a vehicle that is towing a trailer without its own individual braking system. Unbraked towing capacity is usually less than braked towing capacity. For a vehicle to tow another vehicle or trailer, a tow bar, recovery point or tow hitch is needed. This device is attached to the vehicle's chassis.