Parallelogram of Force Apparatus

Marsoni

M251S

$48.67

Get it in 3 business days with 1 day shipping. Friday, May 29

Parallelogram of Force ApparatusCompact Design: This Parallelogram of Force Apparatus is designed for labs with limited space. Thick plywood pieces (12 mm) with dimensions 45 x 30 cm are mounted on a sturdy wooden stand. Complete Kit: Includes 2 sets of z pulleys, 3 sets of slotted weights (50 gms x 5), 5 sets of drawing sheets, drawing pins, mirror strips, and cords for comprehensive experiments on forces and equilibrium. Plywood Construction: Durable and stable plywood

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Terrible design. With most dog ball launchers, swinging your arm like you're throwing a baseball results in a long arching trajectory of the ball, just as expected. The same arm motion with this launcher results in the ball flying straight up. To get the ball to even move forward requires an un-natural forward snap of the wrist, and even then it doesn't travel far. Hasn't anyone tried this out before hitting the market?

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Reviewed in the United States on April 12, 2026

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Bob Conner

Charlottesville, US

★★★★★ 5

Great product

Style: dog ball launcher

Very easy to use, assemble and disassemble. Saves my arm a lot. Unfortunately once my dog runs to the ball she gets side tracked and I have to fetch it. 🫤 I highly recommend this product.

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Reviewed in the United States on April 3, 2026

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Amazon Customer

Los Angeles, US

★★★★★ 4

Fun day in the park

Style: dog ball launcher

My puppy loves it

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Reviewed in the United States on April 29, 2026

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donald m hebert sr.

Bozeman, US

★★★★★ 5

My wife uses it more

Style: dog ball launcher

My dog loves it she can run father

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Reviewed in the United States on April 1, 2026

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owtem

Phoenix, US

★★★★★ 1

Mid at best

Style: dog ball launcher

It’s mid at best. Requires a little trick to get it to go forward and not just fly up in the air., it’s also not telescoping. It just comes apart into two pieces.

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Reviewed in the United States on March 29, 2026