Answer to Question #129422 in Physics for Touheed Iqbal

Question

A). Draw detailed free body diagram for truck, man pushing the cart and cart individually and also free body diagram as a whole.

B) Determine the moment produced by weight of truck including driver (5Ton), man pushing the cart (equals to last four digits of your registration no. in Ib) and moment due to 2 mon crate about last tire A.

Answer 1

A) See the figure.

In the figure,

f - force of friction

N - normal force

F - force the man exerts on the cart

R - force the cart exerts on man

mg - force of gravity

a - acceleration.

B) Without all numerical values we cannot obtain the answer, so let us write equations.

The moment produced by weight of truck including driver can be expressed as

$$\Mu=Tr.$$

T - 'thrust' force

r - radius of the truck's wheel.

The moment due to 2-ton crate about last tire A:

$$\Mu_c=Mgc.$$

M - mass of the crate

c - distance from the bottom to the center of gravity of the crate.