# Skill Set 04.1

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Main Page > IB Physics Skill Sets > Skill Set 04.1

## Contents

- 1 About this page
- 2 Problems
- 2.1 1. A 362 gram object experiences an unbalanced force of 2.31 N. What is its acceleration?
- 2.2 2. A 0.459 kg ball stops from +31 m/s in a distance of +0.17 m. What net force acted on the ball? What direction is the force?
- 2.3 3. Tycho exerts a force of 23 N sideways on a box and it moves at a constant speed. When he exerts 47 N of force, the box accelerates at 5.2 m/s/s in the direction he pushes. What is the box’s mass?
- 2.4 4. A 1217 kg elevator moving 5.2 m/s downward stops in 1.17 s. What must be the tension in the supporting cable as it is stopping?
- 2.5 5. A 63.0 kg mass accelerates at 2.16 m/s/s down a 35.0o incline. What force must be acting along the plane for this to happen? What direction is the force?

## About this page

All images uploaded for this page must start with the string "Skill_Set_4.1_" so the image 16-38.jpg associated with chapter 4 should be uploaded as Skill_Set_4.1_16-38.jpg. This way we can avoid conflicts in the image directory, and we can find images easily.

Table of Contents

## Problems

### 1. A 362 gram object experiences an unbalanced force of 2.31 N. What is its acceleration?

F = ma

2.31 N = (.362 kg)(a)

a = 6.38 m/s^{2}

Table of Contents

### 2. A 0.459 kg ball stops from +31 m/s in a distance of +0.17 m. What net force acted on the ball? What direction is the force?

### 3. Tycho exerts a force of 23 N sideways on a box and it moves at a constant speed. When he exerts 47 N of force, the box accelerates at 5.2 m/s/s in the direction he pushes. What is the box’s mass?

### 4. A 1217 kg elevator moving 5.2 m/s downward stops in 1.17 s. What must be the tension in the supporting cable as it is stopping?

### 5. A 63.0 kg mass accelerates at 2.16 m/s/s down a 35.0o incline. What force must be acting along the plane for this to happen? What direction is the force?

Solution goes here