Calculate the magnitude of the normal force on a 15.2 kg block in the following circumstances. (enter your answers in n.) hint (a) the block is resting on a level surface. 15.2 incorrect: your answer is incorrect. n (b) the block is resting on a surface tilted up at a 25.8° angle with respect to the horizontal. 13.16 incorrect: your answer is incorrect. n (c) the block is resting on the floor of an elevator that is accelerating downward at 2.53 m/s2. n (d) the block is on a level surface and a force of 155 n is exerted on it at an angle of 25.8° above the horizontal.

Explanation:

Given that,

Mass of block = 15.2 kg

(a). The block is resting on a level surface.

We need to calculate the force

Using formula of force

Put the value into the formula

(b). The block is resting on a surface tilted up at a 25.8° angle with respect to the horizontal.

We need to calculate the horizontal force

Using horizontal component

put the value into the formula

(c). The block is resting on the floor of an elevator that is accelerating downward at 2.53 m/s²

We need to calculate the force

Using balance equation

Put the value into the formula

(d). The block is on a level surface and a force of 155 N is exerted on it at an angle of 25.8° above the horizontal.

According to FBD,

We need to calculate the force

Put the value into the formula

Hence, This is the required solution.

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

happy to

pls mark as brainliest

ill do it for 100, also this isnt 80 its 40