Question

question 8
8/10
how does a reindeer manage to pull a sleigh forward?
by reducing the sleighs mass.
by exerting a force greater than the sleigh’s weight.
by increasing the friction between the sleigh and the ground.
by pushing backward on the ground which pushes it

Explanation:

Step1: Recall Newton's third - law

For every action, there is an equal and opposite reaction. When a reindeer pushes backward on the ground, the ground exerts an equal and opposite force on the reindeer, propelling it (and the sleigh it is pulling) forward.

Step2: Analyze each option

Reducing the sleigh's mass doesn't directly make the reindeer pull it forward. The force greater than the sleigh's weight is related to lifting it vertically, not pulling it horizontally. Increasing friction between the sleigh and the ground makes it harder to pull. Pushing backward on the ground which pushes it forward is the correct application of Newton's third - law for forward motion.

Answer:

By pushing backward on the ground which pushes it forward.