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Ludmilka [50]
3 years ago
9

A car drives for 30 km with a speed of 30m/s. How much time does it take the car to travel this distance?

Physics
1 answer:
Artist 52 [7]3 years ago
6 0

                   Time  =  (distance)  /  (speed)

                           =  (30 km)  /  (30 m/s)

                           =  (30,000 m)  /  (30 m/s)

                           =  (30,000 / 30)  sec

                           =      1,000 seconds

                           =      16 minutes  40 seconds  
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Answer:

- horizontal component of the velocity: v_h (because it is constant)

- vertical component of the velocity: 0

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Explanation:

The motion of a projectile consists of two independent motions:

- Along the horizontal direction, there are no forces acting on the projectile (if we neglect air resistance), therefore the horizontal acceleration is zero and the horizontal component of the velocity, vh, is constant

- Along the vertical direction, there is only one force acting on the projectile: the force of gravity, downward, which produces a constant downward acceleration of g=9.8 m/s^2. As a consequence, the vertical component of the velocity changes according to

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So, in summary, at the highest point of the trajectory we have:

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- vertical component of the velocity: 0

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