nel ucel Basic Physics (Phy 114-001) Quiz 1 1. What are the units of speed &acce

Question

nel ucel Basic Physics (Phy 114-001) Quiz 1 1. What are the units of speed &acceleration;? 2. What does it mean to say that a car is traveling at a speed of 60 MPH? 3. If you are driving a car around a curve, and that you maintain a constant speed. Is your velocity also constant? Why? 4. An object travels a distance of 10 meters in 2 seconds. What is the speed of this object? 5. Convert: a) 60 MPH in kilometers per hour b) 97 km/h in meters per second 6. What does the speedometer of a car read: Average speed or Instantancous speed? Are

Explanation / Answer

1. Speed = m/s

acceleration = m / s^2

2. this means that car travels with this speed then car travels 60 miles in 1 hour.

3. velocity has magnitdue and direction both.

magnitude is constant but its direction is changing.

hence velocity is not constant .

4. v = 10 / 2 = 5 m/s

5. (A) 60 x 1.609 km / h = 96.54 km / h

(b) 97 km / h = 97 x 1000 m / 3600 s

= 26.9 m/s

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