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
Alecsey [184]
3 years ago
7

A bullet is fired straight up from a gun with a muzzle velocity of 312 m/s. Neglecting air resistance, what will be its displace

ment after 1.4 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m
Physics
2 answers:
brilliants [131]3 years ago
8 0

Answer:

427.196 m

Explanation:

u = Initial velocity = 312 m/s

t = Time = 1.4 s

s = Displacement

a = -9.8 m/s² (because the bullet is decelerating as the bullet is going straight up)

Equation of motion

s=ut+\frac{1}{2}at^2\\\Rightarrow s=312\times 1.4-\frac{1}{2}\times 9.8\times 1.4^2\\\Rightarrow s=427.196\ m

So, Displacement at 1.4 seconds is 427.196 m

rusak2 [61]3 years ago
3 0

Answer:

427.196 m

Explanation:

Given:

Initial velocity of the bullet, u = 312 m/s

Time, t = 1.4 s

Acceleration due to gravity, g = 9.8 m/s²

since the bullet is fired in the direction opposite to the direction of the acceleration due to the gravity, the acceleration will be negative

therefore,

From  Newton's equation of motion

s=ut+\frac{1}{2}at^2

where,  

s is the displacement

a is the acceleration

on substituting the respective values, we get

s=312\times1.4+\frac{1}{2}\times(-9.8)\times1.4^2

or

s = 436.8 - 9.604 = 427.196 m

You might be interested in
. Reem took a wire of length 10 cm. Her friend Nain took a wire of 5 cm of the same material and thickness both of them connecte
Umnica [9.8K]

Given :

Reem took a wire of length 10 cm. Her friend Nain took a wire of 5 cm of the same material and thickness both of them connected with wires as shown in the circuit given in figure. The current flowing in both the circuits is the same.

To Find :

Will the heat produced in both the cases be equal.

Solution :

Heat released is given by :

H = i²Rt

Here, R is resistance and is given by :

R = \dfrac{\rho L}{A}

So,

H = i^2\times \dfrac{\rho L}{A} t\\\\H = \dfrac{i^2\rho Lt}{A}

Now, in the question every thing is constant except for the length of the wire and from above equation heat is directly proportional to the length of the wire.

So, heat produced by Reem's wire is more than Nain one.

Hence, this is the required solution.

7 0
3 years ago
DLANAS
andriy [413]

Answer:

Se llama ángulo de incidencia -i- el formado por el rayo incidente y la normal. La normal es una recta imaginaria perpendicular a la superficie de separación de los dos medios en el punto de contacto del rayo. El ángulo de reflexión -r- es el formado por el rayo reflejado y la normal.

6 0
4 years ago
4. A car with a mass of 2,200 kg can accelerate from 0 to 30 m/s in 6 seconds.
wlad13 [49]

Answer:

The engine generates a force of 11000 Newtons.

Explanation:

To determine the force, first you will need to calculate the acceleration. Acceleration is change in velocity over change in time, so in this case:

a = \frac{\Delta v}{\Delta t}=\frac{(30-0)\frac{m}{s}}{(6 - 0 )s}=5 \frac{m}{s^2}

Force is then determined as

F=ma = 2200kg\cdot 5\frac{m}{s^2}=11000N

This is the forward force, i.a. one acting in the direction of the car's acceleration. we are told that there is no inefficiency in the engine and transmission, therefore this same force is generated by the engine.  

4 0
3 years ago
A hollow ball weighs 40 newtons. In a water tank, it displaces 15 newtons of water. What is the buoyant force on the ball? Will
motikmotik

Answer:

25N

it will float since the water displaced is less than the weight. buoyancy = 25n down

Explanation:

40 newtons - 25 newtons = 25 newtons

4 0
3 years ago
HELP!!!! NO LINKS!! Order the events that occur in the removal of thermal energy from an object by a refrigerator.
bixtya [17]

Answer:

Thermal energy is transferred from the warm object to the coolant in the refrigerator; coolant is compressed and the coolant's temperature rises (work is done on the coolant); thermal energy is transferred from the warm coolant to the outside air; the coolant expands as it passes through the expansion valve and cools.

Explanation:

hope this helps

8 0
3 years ago
Other questions:
  • What is an item in which magnetic domains can be aligned and a magnetic field induced for a short period of time
    14·2 answers
  • Why is motion a vector?
    9·2 answers
  • A hockey puck of mass 0.17 kg is shot across a rough floor with the roughness different at different places, which can be descri
    14·1 answer
  • How does the gravitational force between two objects change if the distance
    9·1 answer
  • How can volcanic eruptions contribute to global climate change?
    8·2 answers
  • A boy is pulling a wagon with a force of 70.0 N directed at an angle of 30 degrees above the horizontal. What are the x and y co
    13·1 answer
  • According to Newton's first law, a moving odject acted on by a net force of zero-
    6·1 answer
  • A vector has components x=6 m and y=8 m. what is its magnitude and direction?
    9·1 answer
  • What is measurements?​
    9·2 answers
  • If the pressure of a gas is kept constant and the temperature (in Kelvin) is cut in half, the volume will _________.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!