Help me please;)

Help me please;)

I need to know how much the car weighs

A 0.50-kg sphere at the top of an incline has a potential energy of 8.0 joules relative to the base of the incline. Rolling halfway down the incline will cause the sphere's potential energy to be...

If I put a kilogram weight on a pan balance How many 100 gram weights do I need to balance the scale

If I put a 100 gram weight on a pan balance How 10 gram weights do I need to balance the scale

For example if I need 30 g of garlic and it costs $10.00/1000g how much would it cost? Any help would be appreciated!

A floor must be painted twice: once, using a primer that requires 125 grams of paint per square meter of floor, and a second time with a paint that requires 75 grams of paint per square meter of floor...

Ball A of mass 5 kilograms moving at 20 meters per second collides with ball B of unknown mass moving at 10 meters per second in the same direction. A car traveling at 20 m/s has 1,000...

A diagram shows a moving 5.00-kilogram cart at the foot of a hill 10.0 meters high. What is the minimum kinetic energy needed for the cart to move from its current position to reach the top of the...

A 2,000-kilogram car travels at a constant speed of 15 meters per second around a circular curve of radius 20 meters. What is the magnitude of the centripetal acceleration of the car as it goes around...

The following questions refer to a pop-up toy with a mass of 0.35 kg. The toy's spring compresses 0.04 m, and has a spring constant of 3,000 N/m. How high does the pop-up toy...

How much potential energy does 8 million kg of water have as it drops 50 m over Niagara Falls? If a 8 million kg of water flows over Niagara Falls each second, calculate the power available...

Calculate the work done you need to do to raise a 9 kg box a vertical distance of 3 meters. Show all work. When the same box is raised the same vertical distance by pushing it up a 5m long...

A weightlifter lifts a 50 kg barbell 2.5 meters into the air. How much work does she do on a barbell? How much potential energy does the barbell have at the top? If she lifts the barbell...

How much power is expended to raise a 300 kg roller coaster car to the top of a 35 m hill in 10 seconds? How much potential energy does the roller coaster car have at the top of the hill? Show...

The specific gravity of blood at 20 degrees Celsius is given as 1.028. Determine the mass of 1.50 litres of blood in grams and kilograms

The rolling bowling ball strikes a pin (m = 1kg), sending it flying. How fast will the pin move immediately after it is hit? (Think: what equation should you use?) Show work please...

In a car crash, a 50 kg passenger moving at 15 m/s is stopped by an air bag in 0.10 sec. What is the average force the air bag exerts on the passenger? Show work or explain concept...

In a car crash, an air bag exerts -1000 N of force on a 46 kg passenger. The passenger comes to a rest in 0.15 sec. How fast was the passenger moving before the crash? Show work please...

Ball A of mass 5 kilograms moving at 20 meters per second collides with ball B of unknown mass moving at 10 meters per second in the same direction. Which ball has more momentum before...

Ball A of mass 5 kilograms moving at 20 meters per second collides with ball B of unknown mass moving at 10 meters per second in the same direction. When is total momentum greatest...