Two Cannonballs Are Dropped from a Second Floor Physics Lab $\frac{h}{4}$

question 18

Multiple Choice

Two cannonballs are dropped from a second floor physics lab at height h above the ground. Ball B has four times the mass of ball A. When the balls pass the bottom of a first floor window at height $\frac{h}{4}$ above the ground, the relation between their kinetic energies, KA and KB, is:

• A)KA = 4KB.
• B)KA = 2KB.
• C)KA = KB.
• D)KB = 2KA.
• E)KB = 4KA.

---

Definitions:

Promissory Estoppel

A legal principle that prevents a promisor from retracting a promise when the promisee has relied on it to their detriment.

Equitable Treatment

Fair and impartial treatment of all parties involved in a legal matter or transaction.

Uniform Electronic Transactions Act

A set of laws enacted to establish the legal validity of electronic signatures and records in commercial transactions.

Mailbox Rule

A legal doctrine stating that an offer is considered accepted at the moment the acceptance is dispatched, not when it is received by the offeror.