RoyalGurl01
20.10.2020 •
Physics
A rock on the ground weighs 40N. How much force does the ground exert on the rock?
A. 20n
B. 0N
C.40n
Solved
Show answers
More tips
- S Science and Technology Understanding Magnetic Storms: A Guide to This Natural Phenomenon...
- D Dating, Love, Relationships How Long Can Love Last?...
- A Auto and Moto Mastering One-Movement Parking: All You Need to Know...
- C Computers and Internet How to Properly Order Clothing from International Online Stores...
- H Health and Medicine Headache: A Comprehensive Guide to Treatment...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- A Auto and Moto Discovering the Leader: What is the Most Expensive Car in the World?...
- F Food and Cooking How to Quickly Put your Child to Sleep?...
- C Computers and Internet How to Create a Website for Free and Easy?...
- F Family and Home Parquet or laminate, which is better?...
Answers on questions: Physics
- P Physics In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift...
- P Physics Explain how radioactive decay works for measuring the absolute age of ancient objects....
- P Physics A car is coasting to the right and slowing down. Consider (frictional forces and air resistance)...
- P Physics What process do scientists think is causing the movement of Earth’s tectonic plates? Name one other place where this process is occurring naturally....
- P Physics Describe how seismic waves can be used to determine the location of petroleum far beneath the surface....
- P Physics Describe the geological process through which shark’s teeth end up high on a mountain range....
- P Physics What did you know for sure after 1 test? two tests? three tests?...
- P Physics which particle builds a static electric charge when it is transferred from one object to another? a.electron b.molecule c.proton d.atom...
- A Advanced Placement (AP) What accounted for the tremendous appeal of the Great Awakening to colonists in the later half of the 1700’s and who were some of the leaders of that movement?...
- B Business A company sells 800 units at $16 each, has variable costs of $12 per unit, fixed costs of $1,200, and a 40% tax rate. The pre-tax income is $...
Ответ:
The correct option is;
C. 40 N
Explanation:
Given that the rock is on the ground, we have;
The weight of the rock,
= 40 N ↓
From Newton's third law of motion, we have that action and reaction are equal and opposite,
Therefore, given that the weight of the rock exerts a force of 40 N on the ground, and the rock is stable and stationery on the ground, then the ground is reacting to the weight of the rock with an equal force of 40 N, acting in opposite direction to the weight of the block to balance the weight of the rock and create equilibrium such that the net force acting on the rock is zero
∑F =
= 0
Where;
We have;
∴
= 40 N ↑.
Ответ:
Explanation:
(4566 m / 4 min) × (1 km / 1000 m) × (60 min / h) = 68.49 km/h