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2. Pullback motor - Wikipedia

   en.wikipedia.org/wiki/Pullback_motor

   A pullback motor (also pull back, pull back and go or pull-back) is a simple clockwork motor used in toy cars. A patent for them was granted to Bertrand 'Fred' Francis in 1952 as a keyless clockwork motor. Pulling the car backward (hence the name) winds up an internal spiral spring; a flat spiral rather than a helical coil spring. When released ...

3. Pull-rod suspension - Wikipedia

   en.wikipedia.org/wiki/Pull-rod_suspension

   In cars, suspension refers to the system by which the vehicle maintains contact between all of its wheels and the ground. This is commonly achieved via use of dampers and springs, providing downward forces on the wheels to counteract impact shocks. However, in push-rod suspension systems, this strut is mounted across the chassis, parallel to ...

4. Push–pull train - Wikipedia

   en.wikipedia.org/wiki/Push–pull_train

   A push–pull train with two control cars and a locomotive in the middle. Push–pull is a configuration for locomotive -hauled trains, allowing them to be driven from either end of the train, whether having a locomotive at each end or not. A push–pull train has a locomotive at one end of the train, connected via some form of remote control ...

5. Pulled Muscle in Lower Back: Symptoms, Causes, and Treatment

   www.healthline.com/.../pulled-muscle-in-lower-back

   A pulled muscle occurs when you tear or overstretch some of the muscle fibers. This can happen if you overwork the muscle or twist it too hard. You will probably notice pain and swelling, and the ...

6. How to Perfect Pullups, Their Benefits, & More - Healthline

   www.healthline.com/health/pull-ups

   Make sure your hands are a little more than shoulder-width apart. Press your shoulders down. Bring your shoulder blades toward each other, as if you are trying to use them to squeeze a lemon. Lift ...

7. Friction motor - Wikipedia

   en.wikipedia.org/wiki/Friction_motor

   A friction motor is a simple mechanism to propel toy cars, trucks, trains, action figures and similar toys. The motor consists of a large flywheel which is connected to the drive wheels of the toy via a very low gear ratio, so that the flywheel revolves faster. The flywheel's axis is perpendicular to the direction in which the toy faces and moves.

8. 12 Ways to Reduce Lower Back Pain When Driving - Healthline

   www.healthline.com/health/back-pain/lower-back...

   1. Use a lumber support cushion. Lumbar support cushions or pillows can be used to alleviate back pain while you’re driving. Lumbar support cushions provide support for your lower back, or ...

9. Back Muscles: Types, Functions, and How to Strengthen Them

   www.webmd.com/fitness-exercise/back-muscles-what...

   Rhomboids — these muscles connect your scapula to the spine and help you bring your shoulders inward. Trapezius (traps) — these extend from the neck to the lower back in a V shape and allow ...