14. Torque & Rotational Dynamics

Intro to Torque

14. Torque & Rotational Dynamics

# Intro to Torque - Video Tutorials & Practice Problems

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## Intro to Torque

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2

example

## Torque of fish pulling on pole

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4mPlay a video:

3

example

## Example 3

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4

Problem

ProblemYou pull with a 100 N at the edge of a 25 cm long wrench, to tighten a bolt (gold), as shown. The angle shown is 53° . Calculate the torque your force produces on the wrench, about an axis perpendicular to it and through the bolt.

A

9.9 N•m

B

990 N•m

C

15 N•m

D

1500 N•m

E

20 N•m

F

2000 N•m

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PRACTICE PROBLEMS AND ACTIVITIES (17)

- One force acting on a machine part is F = (-5.00 N)i + (4.00 N)j. The vector from the origin to the point wher...
- A machinist is using a wrench to loosen a nut. The wrench is 25.0 cm long, and he exerts a 17.0-N force at the...
- Calculate the torque (magnitude and direction) about point O due to the force F in each of the cases sketched ...
- A metal bar is in the xy-plane with one end of the bar at the origin. A force F = 97.00 N)i + (-3.00 N)j is ap...
- A metal bar is in the xy-plane with one end of the bar at the origin. A force F = 97.00 N)i + (-3.00 N)j is ap...
- A machinist is using a wrench to loosen a nut. The wrench is 25.0 cm long, and he exerts a 17.0-N force at the...
- (I) A 58-kg person riding a bike puts all her weight on each pedal when climbing a hill. The pedals rotate in ...
- (I) A 58-kg person riding a bike puts all her weight on each pedal when climbing a hill. The pedals rotate in ...
- (II) A potter is shaping a bowl on a potter’s wheel rotating at constant angular velocity of 1.6 rev/s (Fig. 1...
- (II) A particle is located at r → ( 5.0î + 3.5ĵ + 6.0k̂)m. A force F→ = (8.0ĵ - 4.0k̂) N acts on it. What is ...
- Force F = ─10ĵ N is exerted on a particle at 𝓇 = (5î＋5ĵ) m. What is the torque on the particle about the orig...
- In FIGURE EX12.19, for what value of Xaxle will the two forces provide 1.8 Nm of torque about the axle?
- (II) The bolts on the cylinder head of an engine require tightening to a torque of 95 m • N.(a) If a wrench is...
- (II) The bolts on the cylinder head of an engine require tightening to a torque of 95 m • N.(b) If the six-sid...
- (II) An engineer estimates that under the most adverse expected weather conditions, the total force on the hig...
- A particle of mass m uniformly accelerates as it moves counterclockwise along the circumference of a circle of...
- (II) The origin of a coordinate system is at the center of a wheel which rotates in the xy plane about its axl...