All categories

4 years ago

A car travels in a straight line for 4.1 h at a constant speed of 95 km/h . What is its acceleration? Answer in units of m/s 2 .

Physics

1 answer:

Zanzabum4 years ago

5 0

Acceleration is a change in speed, so if the car has a constant speed then it's acceleration is 0m/s^2.

You might be interested in

Two trains, each having a speed of 28 km/h, are headed at each other on the same straight track. A bird that can fly 60 km/h fli

Semenov [28]

Answer:

The value is $D = 70.71 \ km$

Explanation:

From the question we are told that

The speed of each train is $v = 28 \ km/h$

The speed of the bird is $v_1 = 60 \ km/h$

The distance between the trains is $d = 66 \ km$

Generally the time taken before the collision occurs is mathematically represented as

$t = \frac{d}{2 * v}$

=> $t = \frac{66 }{2 * 28}$

=> $t = 1.18 \ h$

The total distance covered by the bird is mathematically represented as

$D = v_1 * t$

=> $D = 60 * 1.18$

=> $D = 70.71 \ km$

7 0

3 years ago

Assume that the temperature, 40C, and volume of the gas, 6 liters, remain constant. At 2 atmosphere of pressure, there are 0.036

MAVERICK [17]

Answer:PV=nRT

Ideal gas equation

Explanation:

PV=nRT

Ideal gas equation

7 0

4 years ago

8. John has to hit a bottle with a ball to win a prize. He throws a 0.4 kg ball with a velocity of 18 m/s. It hits a 0.2 kg bott

nasty-shy [4]

Answer: The ball is travelling with a speed of 5.5 m/s after hitting the bottle.

Explanation:

To calculate the speed of ball after the collision, we use the equation of law of conservation of momentum, which is given by:

$m_1u_1+m_2u_2=m_1v_1+m_2v_2$

where,

$m_1,u_1\text{ and }v_1$ are the mass, initial velocity and final velocity of ball.

$m_2,u_2\text{ and }v_2$ are the mass, initial velocity and final velocity of bottle.

We are given:

$m_1=0.4kg\\u_1=18m/s\\v_1=?m/s\\m_2=0.2kg\\u_2=0m/s\\v_2=25m/s$

Putting values in above equation, we get:

$(0.4\times 18)+(0.2\times 0)=(0.4\times v_1)+(0.2\times 25)\\\\v_1=5.5m/s$

Hence, the ball is travelling with a speed of 5.5 m/s after hitting the bottle.

5 0

3 years ago

Which option is an example of chemical energy being transformed into kinetic

SVEN [57.7K]

D I know this because I know lol.

5 0

3 years ago

Read 2 more answers

The blades of a fan running at low speed turn at 26.2 rad/s. When the fan is switched to high speed, the rotation rate increases

Lady bird [3.3K]

Answer: $1.79\ rad/s^2$

Explanation:

Given

Initial angular speed is $\omega_1=26.2\ rad/s$

Final angular speed is $\omega_2=36.5\ rad/s$

Time period $t=5.75\ s$

Magnitude of the fan's acceleration is given by

$\Rightarrow \alpha=\dfrac{\omega_2-\omega_1}{t}$

Insert the values

$\Rightarrow \alpha=\dfrac{36.5-26.2}{5.75}\\\\\Rightarrow \alpha=\dfrac{10.3}{5.75}\\\\\Rightarrow \alpha=1.79\ rad/s^2$

Thus, fan angular acceleration is $1.79\ rad/s^2$

8 0

3 years ago

Read 2 more answers