PHY 2053 Exam 1 This exam is multiple choice. Please,mark your answers on scantr

Question

PHY 2053 Exam 1 This exam is multiple choice. Please,mark your answers on scantrons. All the numeric answers belovw involving g were found using the approximation g = 10, so that, please, use it too. 1. Car accelerates from 10m/s to 20m/s in 2 seconds. The acceleration is: (a) 2 (b) 5 (c) 10 (d) sa 2. In the previous problem the distance traveled by car is: (a) 20m (b) 40m (c) 30m (d) 50m 3 Raindrops are falling straight down at 4 when suddenly wind starts blowing horizontaly at 3 What is the speed of raindrops relative to the ground? (a) 3 (b) 7 (e) 1 ical direetion with the sneed of 10m/s. In what

Explanation / Answer

1. Acceleration = (v - u)/t = (20 - 10)/2 = 10/2 = 5 m/sec^2

2. distance traveled s = (v^2 - u^2)/2a = (20^2 - 10^2)/2*5 = (400 - 100)/10 = 300/10 = 30 m

3. By pythagorus theorem : Speed of raindrop = sqrt(4^2 + 3^2) = 5 m/s

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.