A1.30 kg skateboard is coasting along the pavement at a speed of 6.64 m/s when a 0.680 kg cat drops from a tree vertically downward onto the skateboard. what is the speed of the skateboard-cat combination?

Explanation:

The principle of conservation of linear momentum states that if the sum of forces acting on a system is zero, its linear momentum remains constant over time. So, in this case we have:

The cat drops downward, so their initial speed horizontally is zero(). The skateboard and the cat collide and stick together, so their final speeds are the same():

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever