$1)$

What is the Newton's Third Law Pair to the force M$2$ exerts on M$1?$

the force M$2$ exerts on earth

the weight of M$1$

the force M$1$ exerts on M$2$

Ff

the force from M$1$ on the floor

the force from the floor on M$1$

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$2)$

Now, Fb is increased so that the blocks accelerate. The magnitudes of the two forces are now Ff $=35$ N and Fb $=100$ N$.$

What is the magnitude of the blocks' acceleration?

a$=12\mathrm{.}5$ m$/$s$2$

a$=0\mathrm{.}833$ m$/$s$2$

a$=11\mathrm{.}7$ m$/$s$2$

a$=6\mathrm{.}43$ m$/$s$2$

a$=3\mathrm{.}1$ m$/$s$2$

a$=4\mathrm{.}76$ m$/$s$2$

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Monday, December $9$ at $1$:$34$ PM

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$3)$

What is the x$-$component of F$2$on$1,$ the force that block $2$ exerts on block $1?$

F$2$on$1,$x$=-65$ N

F$2$on$1,$x$=65$ N

F$2$on$1,$x$=29\mathrm{.}4$ N

F$2$on$1,$x$=-29\mathrm{.}4$ N

F$2$on$1,$x$=-44\mathrm{.}3$ N

F$2$on$1,$x$=44\mathrm{.}3$ N