Change in momentum and Impulse

Work out the changes in momentum in the following cases:

a a mass of 3 kg slows from 3 m/s to 1.5 m/s (2 marks)

An electrostatic force of 81N exist between a charge of + 2 x 10-5C and a second charge of + 4.5 x 10-4C. What is the distance between the two charges? Is it attractive or repulsive?

A 1000-kilogram car traveling with a velocity of 20. meters per second decelerates uniformly at - 5.0 meters per second2 until it comes to rest. What is the magnitude of the impulse applied to the car to bring it to rest?

If a heater took 4 minutes to convert 500g of liquid water to 500g of water vapour how long would the same heater take to convert 500g of liquid aluminium to 500g of aluminium gas

During a race, Rachel runs at a speed of 6 m/s. Four seconds later, she is running at a speed of 10 m/s. What is Rachels acceleration?

At full power, how long would it take for the car to accelerate from 0 to 58.0 mph? neglect friction and air resistance.

A girl pushes a cart with a force of 10 N. if the cart has a mass of 5 kg, what is its acceleration?

How long will it take take light moving at 300,000 km/s to reach us from the sun? The sun is 15,000,000 km from earth.

What is a Nebulas relationship between pressure and gravity

When the net force on an object is greater than 0, how is its related to its acceleration

Explain the difference between kinetic and protial energy.