Question

A rollercoaster has a mass of 500kg at the top of a 20m high track How much GPE does it have ?
It then falls to the bottom of the track , how much KE does it now have ?

What is it's velocity at the bottom ?

Answer 1

Answer:

Just when we thought we had verbs figured out, we’re brought face-to-face with a new animal: non-finite verbs. These words look similar to verbs we’ve already been talking about, but they act quite different from those other verbs.

By definition, a non-finite verb cannot serve as the main verb in an independent clause. In practical terms, this means that they don’t serve as the action of a sentence. They also don’t have a tense. While the sentence around them may be past, present, or future tense, the non-finite verbs themselves are neutral. There are three types of non-finite verbs: gerunds, participles, and infinitives.

Gerunds

Gerunds all end in -ing: skiing, reading, dancing, singing, etc. Gerunds act like nouns and can serve as subjects or objects of sentences. They can be created using active or helping verbs:

I like swimming.

Being loved can make someone feel safe.

Do you fancy going out?

Having read the book once before makes me more prepared.

Often the “doer” of the gerund is clearly signaled:

We enjoyed singing yesterday (we ourselves sang)

Tomás likes eating apricots (Tomás himself eats apricots)

However, sometimes the “doer” must be overtly specified, typically in a position immediately before the non-finite verb:

We enjoyed their singing.

We were delighted at Bianca being awarded the prize.

Explanation: