Welcome to Westonci.ca, your one-stop destination for finding answers to all your questions. Join our expert community now! Join our Q&A platform and get accurate answers to all your questions from professionals across multiple disciplines. Discover in-depth answers to your questions from a wide network of professionals on our user-friendly Q&A platform.
Sagot :
1). The 'acceleration due to gravity' is about 9.8m/s². That means
that the downward speed of a a falling object increases by 9.8 m/s
every second it falls.
The egg was thrown downward at 10 m/s, and was falling at 25 m/s
when it went splat on the ground. Gravity increased its speed by
(25 - 10) = 15 m/s. That takes (15/9.8) = 1.53 seconds.
2). The 'acceleration due to gravity' is about 9.8m/s². That means
that the downward speed of a a falling object increases by 9.8 m/s
every second it falls.
After falling for 2.5 sec, its downward speed is (2.5 x 9.8) = 24.5 m/s
faster than it was when the object began falling.
3). The 'acceleration due to gravity' is about 9.8m/s². That means
that the downward speed of a a falling object increases by 9.8 m/s
every second it falls.
(Have you noticed a pattern among these questions yet ?)
Acceleration = (change of speed) / (time for the chage).
change of speed = (end speed) minus (start speed) = (25m/s - start speed).
Acceleration = (25m/s - start speed) / (time for the change)
1.5 m/s² = (25m/s - start speed) / (10 sec)
Let's multiply each side by 10sec : 15 m/s = 25m/s - start-speed
Add start-speed to each side: start-speed + 15 m/s = 25 m/s
Subtract 15 m/s from each side: Start-speed = (25-15) m/s = 10 m/s
========================
Quicker & easier way:
(Caution ... requires thinking)
Accelerate uniformly at 1.5 m/s² for 10 sec ===> gain 15 m/s of speed
Moving at 25 m/s after gaining 15m/s ===> must have started out at 10m/s.
We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. We appreciate your visit. Our platform is always here to offer accurate and reliable answers. Return anytime. We're dedicated to helping you find the answers you need at Westonci.ca. Don't hesitate to return for more.