Soru
Question 2: A car starts from rest and travels at a constant acceleration of 3000mi/h^2 along a straight path.How long does it take for it to reach a distance of 1 mile? What is its velocity at that point? (a) 1.55 min, 60mi/h (b) 3.33min,77.5mi/h (c) 3.33 min, 60mi/h (d) 1.55min,77.5mi/h
Çözüm
4.2
(188 Oylar)
Kevser
Elit · 8 yıl öğretmeni
Uzman doğrulaması
Cevap
To solve this problem, we can use the kinematic equations for uniformly accelerated motion. The car starts from rest, so the initial velocity
. The acceleration is given as
. We need to find the time
it takes to travel a distance
mile and the velocity
at that distance.First, let's find the time
using the equation:
Since
, the equation simplifies to:
Solving for
:
Next, let's find the velocity
at that distance using the equation:
Since
, the equation simplifies to:
Substituting the values:
Therefore, the correct answer is:(d)