A70 kg box on a horizontal surface, is pulled by a force of 400 n at 30 degree with the respect to the horizontal. the coefficient of friction between the box and the surface is 0.50. assume the motion is horizontal. (a) draw a free body diagram of the system (b) find the normal force (c) find the horizontal force.

(a) See image attached

(b) 486.7 N

(c) 103.06 N

Explanation:

(a)

The free body diagram is attached

(b)

Normal force (N)

Where m is the mass, g for acceleration due to gravity, F for pulling force and is angle of inclination

Substituting 70 Kg for m, for g, 400 N for F and  for we obtain

N=(70*9.81)-(400sin 30)=486.7 N

N=486.7 N

(c)

where is the net force on horizontal axis, Fr is frictional force which is given by

Substituting 400 for F, for , 0.5 for and 486.7 for N we obtain

Therefore, horizontal force is 103.06 N

the expression 15n + 2(3p) represents the amount isaiah spent buying gasoline and snacks, where n represents the price of each gallon of gasoline and p represents the cost of each snack that he bought. which statement is true about the amount isaiah spent?

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles