Kinematics

Momentum before = momentum after.

Since there was no movement before, momentum before = 0

If you think of the bullet as forward/positive momentum and the gun as backward/negative momentum then the momentum of the bullet plus the momentum of the gun =0

and therefore the momentum of the bullet = the momentum if the gun.

momentum = mass x velocity P=m/v

20gx150m/s = 2000g (2kg) x velocity

3000 = 2000v

3000 / 2000 = v

v = 1.5m/s

240 mph = 386.2 kph

Yes, an object can have a constant speed but varying velocity if it changes direction while moving at that speed. Velocity includes both speed and direction, so if an object is moving in a straight line at a constant speed but changing direction, then its velocity is constantly changing even though its speed remains the same.

The formula for speed is speed = distance / time, where speed is measured in m/s or km/h. The formula for acceleration is acceleration = change in velocity / time taken, where acceleration is measured in m/s².

There are no miles in 75 kilometers per hour, it is a measure of speed and not distance. To convert 75 kilometers per hour to miles per hour, you can use the conversion factor: 1 kilometer is approximately 0.621 miles. So, 75 kilometers per hour is approximately 46.6 miles per hour.

Winds of 50 mph are considered strong and fall into the category of "strong wind" on the Beaufort scale. These winds can cause minor damage such as broken tree branches, loose objects being blown around, and difficulty walking or biking against the wind.

Rotational motion occurs when an object spins around an axis without changing its linear position. This type of motion is characterized by the object's circular movement around a fixed point. Examples include the spinning of a top or the rotation of a wheel on an axle.

The spring constant of a slinky can vary depending on factors such as the material it is made of, its design, and manufacturing process. Typically, the spring constant of a slinky is around 1-2 N/m.

90 kph = 55.9 mph

A stopwatch is more versatile as it can be used in a variety of situations, while a light gate is more specific and limited to measuring the time it takes for an object to pass through a light beam. The choice between the two depends on the specific requirements of your experiment or measurement.

average kinetic energy of molecules is roughly equivilant to temperature. as water reaches boiling point the temperature stops increasing. Instead the energy your putting in makes a phase change from liquid to gas.

Average kinetic energy can be classified as temperature because it is a measure of the average motion of particles in a substance. Heat, on the other hand, is a form of energy that is transferred between objects due to a temperature difference.

When potential energy and kinetic energy are combined it is called mechanical energy.

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position).

1 kph = 0.621371192 mph

so

42 kph = 42 * 0.621371192 = 26.097590064 mph

A object falling form a height, h. At h it has graventational potential energy and when it starts to fall this energy tranferes into kenetic.
ability toput mass of any sort into a motion of accelleration therefore resulting in having potential of producing kenetic energy into said mass

Mach 9.6 is approximately 11,700 kilometers per hour or about 7,300 miles per hour. It is nearly 9.6 times the speed of sound in air at sea level.

30.66 meters per second is equivalent to approximately 68.56 miles per hour.

Gas particles are so small in relation to the distances between them that their individual volumes can be assumed to be insignificant. The large relative distances between the gas particles means that there is considerable empty space between the particles. This assumption that gas particles are far apart explains the important property of gas compressibility: A gas is easily compressed because of the space between the particles. Therefore, the energy of a collision is absorbed when the gas particles are forced closer together.

The second property of gas particles assumed by the kinetic theory is that no attractive or repulsive forces exist between the particles. As a result, gases are free to move inside their containers. In fact, a gas expands until it takes the shape and volume of its container.

The third assumption is that gas particles move rapidly in constant random motion. The particles travel in straight paths and move independently of each other. Only when a particle collides with another particle or object does it deviate from its straight line path. Kinetic theory assumes further that these collisions between gas particles are perfectly elastic, which means that during a collision the total amount of kinetic energy remains constant and that the kinetic energy is transferred without loss from one particle to another. You should also recall that the average kinetic energy of a collection of gas particles in directly proportional to the Kelvin temperature of the gas.

45 km/h is 27.9617 mph

Due to mach speeds being the percentage of the speed of sound and the speed of sound changing with air density and temperature the answer varies but mach .95 at 30,000ft is 645.05 mph

The speed of sound is approximately 767 mph at sea level. To break the sound barrier, an object would need to travel faster than this speed, so it would have to be moving faster than 767 mph.

velocity is a vector quantity and also acceleration is a vector quantity. Suppose my automobile is travelling in north direction and I apply brakes to it then until the automobile stops it will move in north direction while the acceleration will act in south direction as brakes are applied.

50 kilometers per hour is 31.07 miles per hour.