4. You let go of a 0.3kg ball from a height of 2m. When the ball bounces off the ground, it loses 15% of its energy as sound. a How high does the ball bounce back up after hitting the ground? b. What initial velocity would the ball need to be thrown dowwnward at so that it would bounce back up to a maximum height of 2m?

Q: A train travels a distance of 300 m at a constant acceleration. If it starts from rest, what is its…

A: Given: The distance covered is 300 m. The time duration is 20 s.

Q: Ms.Barone's car accelerates from 0 to 60 m/s in 3 seconds. It's acceleration is

A: The initial velocity, u=0 m/s   The final velocity, v=60 m/s   The time taken, t=3 s

Q: Have you kept in mind the person accelerates at the start.

A: In the attached graph , we can see that the person is accelerating for the first 7 sec.

Q: What was its velocity when it was fired?

A:

Q: A machine motion is equation: S = t - 4t + 4 where S is distance in m, and t is time in seconds.…

A:

Q: Johnny drives on a freeway at a constant speed of 100nmph and in a straight line, what is happening…

A: Acceleration is the rate of change of velocity.

Q: How fast is a dropped object moving after it falls for 4 s?

A: Given data:  Initial velocity (u) = 0 m/s Time (t) = 4 s  Required: Final velocity (v)

Q: A car that starts from rest must reach a speed of 21 in a distance of 386 m. What average…

A: Given:- The car start from rest and reach the speed of 21 m/s2 The distance traveled by the car is s…

Q: An airplane travels 40 miles in 10 minutes, then travels 20 miles in 80 minutes. Is the pilot…

A: Given data :- distance d1 = 40 miles time t1 = 10 minutes distance d2 = 20 miles time t2 = 80…

Q: which terms represent scalar quantities

A: The physical quantities which have only magnitude are known as scalar quantities. It is fully…

Q: A rock attached to a string swings back and forth every 6.6 s. How long is the string

A:

Q: If a flea can jump straight up to a height of 0.440m, what is its initial speed as it leaves the…

A: Given data:  A projectile motion Maximum height (h) = 0.440 m Required: Initial speed (v0)

Q: A car starts from rest and reaches a speed of 88ft/s in 16 s. How far does travel during this time?

A:

Q: You lock up the brakes on your new Ferrari and skid to a tire screeching stop in 88 feet. Calculate…

A:

Q: A ball is dropped from the top of an 87m building. Does it reach the ground in 5.5 seconds?

A:

Q: A jogger's average speed during his 1.25-h run is 2.05 m/s. The distance he runs during his workout…

A:

Q: acceleration of the crate in m/s?

A: Given data:   The mass of crate is: M = 2.49 kg The force applied at an angle is: θ = 27.9o The…

Q: A car initially traveling at 12.5 mph comes to rest in 8 s.  What was its acceleration in this time?

A:

Q: A bicycle travelling at 8.0m/s [East] slows to 3.0m/s [East]. What is the bicycle's change in…

A: The objective of the question is to find the change in velocity and the direction of acceleration of…

Q: A car hits a wall at 45 mph.  That is equivalent to falling from what height and hitting the ground

A: Given : vi = 45 mph = 20.117 m/s vf = 0 m/s

Q: You lock up the brakes on your new Ferrari, and skid to a tire-screeching stop in 88 feet. Calculate…

A: Write the given values of this problem. d=88 feet Let speed=vOriginal speed=v2And time=t

Q: An airplane reaches a velocity of 80 m/s when it takes off. If the runway is 1 km in length, what…

A: Acceleration can be found by using equation of motion .

Q: Find the speed of the block after it has slid 2.30 m.

A:

Q: What is instantaneous acceleration?

A: instantaneous acceleration

Q: In a swimming race, Briana swam 50 meters in 40 seconds.  What is her average speed?

A: The given data are: d=50 mt=40 s Here, d denotes the distance and t denotes the time.

Q: if a car starts from rest and reaches a speed of 20 m/s in 5s, what distance was covered?

A: To find out the distance , we will use equation of motion :  s= ut + 1/2 at^2  where , s= distance…