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A block of mass mblock = 1.1 kg rests on a cart of mass mcart = 3.4 kg, which moves without friction on a horizontal surface. The coefficient of static friction between the block and the cart is µ = 0.69. The cart is accelerating to the right.

1) What is the maximum acceleration such that the block does not slide on the cart? Amax = ?m/s2

2) What is the magnitude of the force on the cart required to provide the acceleration Amax? F =?

Respuesta :

Answer:

a.[tex]6.76 m/s^2[/tex]

b.30.4 N

Explanation:

We are given that

Mass of block=m=1.1 kg

Mass of cart=M=3.4 kg

Total mass=m+M=1.1+3.4=4.5 Kg

[tex]\mu=0.69[/tex]

1.We have to find the maximum acceleration such that block does not slide on the cart.

Normal force=[tex]\mu mg[/tex]

[tex]\mu mg=ma[/tex]

[tex]a=\mu g[/tex]

Substitute the values

[tex]a=0.69\times 9.8=6.76 m/s^2[/tex]

Using [tex]g=9.8m/s^2[/tex]

Hence, the maximum acceleration such that block does not slide on the cart=[tex]6.76 m/s^2[/tex]

b.[tex]F=ma_{max}[/tex]

Using the formula

[tex]F=4.5\times (6.76)=30.4 N[/tex]

Hence, the magnitude of the force on the cart required to provide the maximum acceleration=30.4 N