A Block of Mass M = 4 $v _ { \mathrm { i } } = 9.2 \mathrm {~m} / \mathrm { s }$

question 79

Multiple Choice

A block of mass m = 4.4 kg, moving on frictionless surface with a speed $v _ { \mathrm { i } } = 9.2 \mathrm {~m} / \mathrm { s }$ makes a sudden perfectly elastic collision with a second block of mass M, as shown in the figure. The second block is originally at rest. Just after the collision, the 4.4-kg block recoils with a speed of $v _ { \mathrm { f } } = 2.5 \mathrm {~m} / \mathrm { s }$ What is the mass M of the second block?

• A) 7.7 kg
• B) 9.0 kg
• C) 10 kg
• D) 0 kg

---

Definitions:

Money Supply

The total amount of monetary assets available in an economy at a specific time, including cash, coins, and balances in bank accounts.

Market Rate

The prevailing interest rate available in the marketplace on a given financial product or the current price of a commodity or service.

Open Market Operations

Central bank activities involving the buying and selling of government securities in the open market to control the money supply and influence interest rates.

Monetary Policy

Actions undertaken by a central bank, such as setting interest rates or buying securities, to influence the money supply and achieve economic goals.