Question

[20 points] Two identical blocks are pushed up frictionless ramps as shown. Consider the portion of the motion of block 1 during which it moves a distance L1, and the portion of the motion of block 2 during which it moves a distance L2. Each block is displaced the same vertical distance Z. The hand pushes parallel to the incline with the same magnitude of force FBH in both cases. Block 1 moves with constant speed Ramp Ramp 2 A. [5 pts] Is the absolute value of the work done by the hand on block 1 greater than, less than or equal to the absolute value of the work done by the hand on block 2? Explain your reasoning. B. [5 pts] Is the absolute value of the work done by the gravitational force on block 1 greater than, less than, or equal to the absolute value of the work done by the gravitational force on block 2? Explain your reasoning. C. [5 pts] Is the absolute value of the work done by ramp 1 on block 1 greater than, less than, or equal to the absolute value of the work done by the ramp 2 on block 2? Explain your reasoning. D. [5 pts] Does the speed of block 2 increase, decrease, or remain constant as it moves the distance shown (L2)? Explain your reasoning

Answer 1

Sin ce (A) S0 won k done on lock 2 Wonk done on block (8) Gunavisy Son ce =mg is Some fon both, aepo Zis O wrk dore by gnavitatonal Sonce eua Same so (C) 2 Force by perpendiculan o FN= remp MgcorDxcons9 x2 Wbnk dona ascoso, cconb2 Ctr (ds Fan beock Fazmgsin6, But 5on block 2 SinozSin VIDIA Fa >mgsine So block will accelenate specd incneare 50