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Roller Coaster Cart Mass = 200kg String Compressed by 5m Initial Velocity 25 m/s Find the Spring Constant

Standing at the edge of a cliff 240 m tall, you throw two balls into the air – one directly upwards at 5 m/s and another directly downwards at -5 m/s. Use conservation of energy to show that they will have the same final speed at the bottom.

A 25000 kg bowling ball moving at 40 m/s on a path angled at 17° hits a 10000 kg bowling ball moving at 25 m/s on a path angled at 60°, causing the lighter ball to be deflected off to an 80° angle. Assuming this is a two-dimensional perfectly elastic coll...

Forty members of a group are making candles. One member drops out and the rest have to make three more candles each to make up. Each member makes the same number of candles. How many candles do they make altogether.

Could you break it down a little further?

Someone and ごめんなさい are both right, got 100 percent