1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
notsponge [240]
3 years ago
5

A rock is thrown straight up. What is the net external force acting on the rock when it is at the top of its trajectory?

Physics
1 answer:
Korolek [52]3 years ago
6 0

Answer:

Net external force acting on the rock when it is at the top of its trajectory is force due to gravity (mg).

Explanation:

The forces acting on a rock thrown up are force due to gravity and air resistance. Air resistance is directly proportional to velocity of rock, when velocity is zero air resistance is zero. When it is at the top of its trajectory its velocity is zero. So air resistance is also zero. Hence only gravitational force acts on the rock.

Net external force acting on the rock when it is at the top of its trajectory is force due to gravity (mg).

You might be interested in
Waves with higher amplitude transfer ____energy.
natali 33 [55]

Answer:

- Waves with higher amplitude transfer HIGHER energy.

- Waves with higher frequency transfer HIGHER energy.

3 0
2 years ago
A car starts from rest and speeds up to 30 m/s in a total of 6 s.
sveta [45]
5 m/s
30 divided by 6 is 5
4 0
2 years ago
Read 2 more answers
Cheetah mothers perform a number of different behaviors. They and their cubs stay in one place for only four days, moving on bef
Mekhanik [1.2K]

Answer:

Cheetah cubs are in danger from predators like lions and hyenas which can track their prey by scent and so the mother and her cubs leave an area when their scent is too strong so that they are not hunted and the cubs survive.

Mother Cheetahs also train their cubs to hunt so that they may get food for themselves which will ensure their survival as well thus showing that both of these practices can impact on reproductive success.

4 0
3 years ago
Help!?!? Please and thank you
natita [175]
C is probably the correct one
3 0
3 years ago
Read 2 more answers
What is the main reason why people use machines
Butoxors [25]

Answer:

Machines are faster and more efficent

Explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • How is net force calculated when two forces act on an object in opposite directions?
    8·1 answer
  • A lion has a mass of 45 kg. Answer the following questions about it, using correct units. a. The lion runs at a speed of 14.2 m/
    14·1 answer
  • A race car starts at rest and speeds up to 40 m/s in a distance of 100 m. Determine the acceleration of the car.
    12·1 answer
  • What is role of gravity in our daily life?
    6·1 answer
  • How are mass and inertia related
    8·1 answer
  • Se dea caer una pelota de basquetbol desde una altura de 90 metros.Calcular: El tiempo en que demorara en caer y a velcidad con
    13·1 answer
  • Use the f=ma formula to determine your weight in newtons AND pounds on the Moon and Pluto you have a mass of 70.3 kilograms
    8·1 answer
  • A heat engine has three quarters the thermal efficiency of a carnot engine operating between temperatures of 65°C and 435°C if
    15·1 answer
  • A football player kicks a ball with an initial velocity of 15 m/s at an angle of 43° above the horizontal. Approximately,
    7·1 answer
  • Find the magnitude of the sum of these two vectors: B 101 m 60.0 ° 85.0 m A​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!