Bikes Cars and Boats

Vivian C asked:


Suppose a car can accelerate at 1m/s2. How large a break in traffic is needed to enter a highway where cars are moving a 20m/s if the drive wants to avoid forcing the next car to slow down or to approach closer than 25m?

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perri w asked:


physics question: A car is driven 120 km west and then 95 km southwest. What is the displacement of the car from the point of origin?

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Brittyx. asked:


And what happens when a moving car hits another moving car in the opposite direction?

Are collisions between 2 cars computer elastic, completely inelastic or a combination of these?
And does the direction of the car’s initial velocity affect the elasticity of the collision?

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asama asked:


I want to know how the car overtakes a bike even when both are traveling at a same speed.I will put my question in a easier way.

Ex:A bike and car travels at 60mph starting at the same point and time . My question is whether both will reach 60miles after one hour simultaneously?. I know obviously car will reach faster than bike. Whats the reason behind this ??

Kindly answer my question.

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RelientKayers asked:


A boat of mass 250 kg is coasting, with its engine in neutral, through the water at speed 3.00 m/s when it starts to rain. The rain is falling vertically, and it accumulates in the boat at the rate of 10.0 kg/hr.

The drag is proportional to the square of the speed of the boat, in the form F_d= 0.5 v^2. What is the acceleration of the boat just after the rain starts? Take the positive x axis along the direction of motion.

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