Physics High School

A 5kg box rests on a table. a 3 kg box rests on top of the 5 kg box. what is the normal force from the table?

a. 19.6 n
b. 29.4 n
c. 49 n
d. 78.4 n ​

Answers

Answer 1

==>  The total mass resting on the table is (5 kg + 3 kg) = 8 kg.

==>  The total weight of that mass is (8 kg) x (9.8 m/s) = 78.4 newtons

==>  The boxes are stacked.  So the table doesn't know if the weight on it is coming from one box, 2 boxes, 3 boxes, or 100 boxes in a stack.  The table only knows that there is a downward force of 78.4 newtons on it.

==>  The table stands in a Physics classroom, and it soaks up everything it hears there.  It knows that every action produces an equal and opposite reaction, and that forces always occur in pairs.  

Ever since the day it was only a pile of lumber out behind the hardware store in the rain, the table has known that in order to maintain the good  reputation of tables all over the world, it must resist the weight of anything placed upon it with an identical upward force.  This is the normal thing for all good tables to do, up to the ultimate structural limit of their materials and construction, and it is known as the "normal force".

So the table in your question provides a normal force of 78.4 newtons. (d)

Related Questions

When two things are the same temperature:
А
Heat transfer between the two things stops
B
Their molecules stop moving
They have the same number of molecules
D
Their molecules move at the same average speed

Answers

Answer:

When two objects are in thermal equilibrium they are said to have the same temperature. During the process of reaching thermal equilibrium, heat, which is a form of energy, is transferred between the objects.

The force of the pulley is 652 newtons. It accelerates at 53 m/s. How much does the object weigh. a 1230 grams b 1.230 gram c 123.0 grams d 12.30 Grams

Answers

Answer:

d. 12.30 grams

Explanation:

Given the following data;

Force = 652 N

Acceleration = 53 m/s²

To find how much the object weigh, we would need to determine its mass;

Force = mass * acceleration

652 = mass * 53

Mass = 652/53

Mass = 12.30 grams.

Therefore, the object weighs 12.30 grams.

please help me !!!!!!

Answers

Answer:

A

Explanation:

A disadvantage is that sexual reproduction takes longer than asexual reproduction. A mate must be found, the egg must be fertilised by sperm, and then the offspring develop. ... This means that some individuals would survive and be able to reproduce and generate more offspring.

Calculate the speed of a dolphin that is observed swimming 75 meters in 5.0 seconds.

Answers

Answer:

15 meters/second

Explanation:

Other Questions
The average distance from the Sun to Mars is 22,793, 910,000,000 centimeters.The conversion factors between centimeters and four other units of measure are shown below.9.46. 10^17 cm = 1 light-year1.50.10^13 cm = 1 astronomical1 . 10^5 cm = 1 kilometer1. 10^2 = 1 meterFor the distance to be expressed as x units of measure, where 1 < x < 10, which unit of measure must be used?A Light-yearsB) Astronomical unitsC)KilometersD) Meters Plz Help!!! Due un 5 minutes! I will give brainliest!! 25+8x=5+12x whats the answer? Beth broke her ankle bone. The doctor gives her a brochure on foods she can eat to help restore the health of her bones. Which element will help Beth strengthen the bone? 1.carbon 2.phosphorus 3.nitrogen How many times do you need to multiply by ten to get from 0.35 to 35? NEED HELP ASAP Describe the steps Greeks followed when they started a new colony Some systems of inequalities can have no solution. Lincoln, Inc., which uses a volume-based cost system, produces cat condos that sell for $140 each. Direct materials cost $22 per unit, and direct labor costs $15 per unit. Manufacturing overhead is applied at a rate of 280% of direct labor cost. Nonmanufacturing costs are $34 per unit. What is the gross profit margin for the cat condos Which represents the numbers in order from least to greatest?9%, 9/10, 9. -9/1 Manufacturing overhead for the month was underapplied by $6,000. The company allocates any underapplied or overapplied manufacturing overhead among work in process, finished goods, and cost of goods sold at the end of the month on the basis of the overhead applied during the month in those accounts. The journal entry to record the allocation of any underapplied or overapplied manufacturing overhead for January would include the following: Work In Process Finished Goods Cost of Goods Sold TotalDirect materials $10,670 $12,000 $81,120 $103,790 Direct labor 11,630 15,000 101,400 128,030 Manufacturing overhead applied 9,680 9,680 68,640 88,000 Total $31,980 $36,680 $251,160 $319,820 Manufacturing overhead for the month was underapplied by $6,000.The Corporation allocates any underapplied or overapplied manufacturing overhead among work in process, finished goods, and cost of goods sold at the end of the month on the basis of the manufacturing overhead applied during the month in those accounts.The journal entry to record the allocation of any underapplied or overapplied manufacturing overhead for May would include the following:a. credit to Work in Process of $31,980.b. debit to Work in Process of $660.c. credit to Work in Process of $660.d. debit to Work in Process of $31,980. please help it should be ez for you guys ;-; brainiest to best answer :D (Al = 27.0 g, O = 16.0 g, H = 1.0 g)2 Al(OH)3 Al2O3 + 3 H2O how many grams are produced from .85 moles of AI(OH)3 Calculate the speed of a dolphin that is observed swimming 75 meters in 5.0 seconds. Answer in 1-2 sentences The Adams-Onis Treaty was beneficial to the United States because -(15 points)A. We developed a peaceful relationship with SpainB. Spain was willing to sell us Texas for $15 millionC. Britain agreed to stop seizing American merchant ships, and pay for damages of ships already capturedD. We acquired more territory peacefully Given the parallelogramwith the mand mFind the m(8x + 14) (6x + 13)55B) 55A) 110C) 7D) 70 Did the US knew about the concentration camps during WW2? A major storm has winds speeds that are at least 110 miles per hour.Write and solve an inequality that describes how much greater these wind speeds are than the slowest hurricane 50 points! I only want mhanifa to help me so no one else answer unless you actually know how to do it An applicant for a position with a federal facility can be disqualified for _____.A. current or previous drug useB. poor attendance record in schoolC. felony convictionsD. misdemeanor convictions