211)Firctional force =μmg acts on both blocks.
a net=μg+μmg/M=5+5/2=7.5
2)a=μg=2
v=u+at
t=2
x=1/2at2=4
Ans(4,2)
1. A block A of mass m is placed over a plank B of mass 2m. The friction between them is .5 while the ground surface is smooth. The upper block A is imparted a velocity V towards right. The acceleration of B relative to A will be :
2. A stationary body of mass m is lowered onto a massive platform of mass M (M >> m) moving at speed V = 4m/s. The time taken by the body to slide along the platform is t. The distance ' x ' that it will travel during this time if friction coefficient is μ = .2 , is :
(Find x,t)
3. What does " 109% pure H2SO4 " suggests?
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2 Answers
21
71Lol. Pity at problem 2. Don't know why I thought more.