Dynamics 2) A constant force of F acts on a mass asshown. The mass starts its motion from rest atposition 1, the unstretched length of the spring350 mm 250 mm -250 mmis 250 mm, and the spring modulus is k =1,5 kN /m. Neglecting the friction, determine300 mmthe required force F to cause the 2 - kg massto have a speed of v2 = 1,5 m/s at position 2.15

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2) A constant force of F acts on a mass as shown. The mass starts its motion from rest at position 1, the unstretched length of the spring is 250 mm, and the spring modulus is k = 1,5 kN /m. Neglecting the friction, determine -250 mm 250 mm 350 mm 300 mm the required force F to cause the 2 – kg mass to have a speed of v2 = 1,5 m/s at position 2.

2) A constant force of F acts on a mass as shown. The mass starts its motion from rest at position 1, the unstretched length of the spring is 250 mm, and the spring modulus is k = 1,5 kN /m. Neglecting the friction, determine -250 mm 250 mm 350 mm 300 mm the required force F to cause the 2 – kg mass to have a speed of v2 = 1,5 m/s at position 2.

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.79P: The coefficient of rolling resistance between the 30-kg lawn roller and the ground is r=0.1. (a)...

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Question

Dynamics

2) A constant force of F acts on a mass as
shown. The mass starts its motion from rest at
position 1, the unstretched length of the spring
350 mm 250 mm -250 mm
is 250 mm, and the spring modulus is k =
1,5 kN /m. Neglecting the friction, determine
300 mm
the required force F to cause the 2 - kg mass
to have a speed of v2 = 1,5 m/s at position 2.
15

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