A HBEREY goalié is standing on ice. Another player fires a puck (m = 0.170 kg) at the goalie with a velocity of +46.7 m/s. (a) If the goalie catches the puck with his glove in a time of 2.34 x 10 s, what is the magnitude of the average force exerted on the goalie by the puck? (b) Instead of catching the puck, the goalie slaps it with his stick and returns the puck straight back to the player with a velocity of -46.7 m/s. The puck and stick are in contact for a time of 2.34 x 10 s. Now, what is the magnitude of the average force exerted on the goalie by the puck? Verify that your answers to parts (a) and (b) are consistent with the conclusion of Conceptual Example 3.

A HBEREY goalié is standing on ice. Another player fires a puck (m = 0.170 kg) at the goalie with a velocity of +46.7 m/s. (a) If the goalie catches the puck with his glove in a time of 2.34 x 10 s, what is the magnitude of the average force exerted on the goalie by the puck? (b) Instead of catching the puck, the goalie slaps it with his stick and returns the puck straight back to the player with a velocity of -46.7 m/s. The puck and stick are in contact for a time of 2.34 x 10 s. Now, what is the magnitude of the average force exerted on the goalie by the puck? Verify that your answers to parts (a) and (b) are consistent with the conclusion of Conceptual Example 3.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

### Physics Problem: Average Force Exerted by a Hockey Puck

**Context:**
A hockey goalie is standing on ice. Another player fires a puck (mass = 0.170 kg) at the goalie with a velocity of +46.7 m/s.

#### Problem Statement:
1. **(a)** If the goalie catches the puck with his glove in a time of 2.34 × 10<sup>-3</sup> seconds, what is the magnitude of the average force exerted on the goalie by the puck?
2. **(b)** Instead of catching the puck, the goalie slaps it with his stick and returns the puck straight back to the player with a velocity of -46.7 m/s. The puck and stick are in contact for a time of 2.34 × 10<sup>-3</sup> seconds. What is the magnitude of the average force exerted on the goalie by the puck?

#### Additional Instruction:
Verify that your answers to parts (a) and (b) are consistent with the conclusion of Conceptual Example 3.

**Answer Fields:**

(a) Number [Input box] Units [Dropdown]

(b) Number [Input box] Units [Dropdown]

---

#### Steps to Solve:

1. **Determine the change in momentum (Δp) of the puck:**
- For part (a), the puck comes to rest (final velocity = 0).
- For part (b), the puck is returned with equal and opposite velocity.

2. **Calculate the average force using Newton's second law (F = Δp/Δt):**
- Use the given contact time in each case.

3. **Input the calculated force in the provided fields.**

**Conceptual Example Reference:**
Refer to the Conceptual Example 3 to validate the consistency of your results.

---
This explanation is structured to guide students through the problem while explaining the physics concepts such as momentum, impulse, and forces.

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