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VMariaS [17]
3 years ago
14

An NFL place kicker is practicing his extra-point kicks. He kicks

Physics
1 answer:
Nezavi [6.7K]3 years ago
5 0

Answer:

83 mph

Explanation:

We are told that the collision is perfect elastic, this means that no energy whatsoever was lost in the process.

We can apply the principle of conservation of momentum. It states that the total final momentum is equal to the total initial momentum in a system.

Hence, if the mass of the wall is assumed to be M and the mass of the ball is assumed to be m, we have that:

(M * V) + (m * v) = (M * U) + (m * u)

Where V = final velocity of Wall = 0 mph

v = final velocity of ball

U = initial velocity of wall = 0 mph

u = initial velocity of ball = 83 mph

Hence:

(M * 0) + (m * v) = (M * 0) + (m * 83)

=> mv = m * 83

=> v = 83 mph

The ball would have a final velocity of 83 mph.

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Describe what happens when u mix hot water with cold
svetoff [14.1K]
The hot immediately increase the temperature of the cold water until they both reach equilibrium state.
6 0
3 years ago
A boy pushes on a wagon so that it accelerates at a rate of 0.50 m/s2. The wagon has a mass of 24 kg. What is the magnitude of t
IRISSAK [1]

Answer:

12N

Explanation:

Force acting on any body is equal to mass of body multiplied by acceleration produced in the body.

Its formula is

F = M*a

where F is the force acting on body

M is the mass of the body

a is the acceleration produced in the body

Unit of force is Newton represented by N

1 N is force acting on body of mass 1 kg which produces acceleration of 1m/s^2.

_____________________________________

Given

a = 0.50 m/s^2

M = 24 kg

therefore

F = 24*0.5 = 12 N

Thus,  magnitude of the boy's pushing force is 12 N.

4 0
4 years ago
Andrew kicks a ball along a straight path. The ball rolls straight forward for 13.2 meters. Then Andrew kicks the ball straight
tresset_1 [31]

Answer: 22.7 meters

Explanation: The distance traveled is how much the ball has rolled in total, this means the lenght of the path that it has followed from begining to end.

Since it first travels 13.2 meters and then 9.5 meters, if we sum this quantities:

13.2 + 9.5 = 22.7 meters

So 22.7 is the distance that the ball has traveled.

7 0
4 years ago
What makes water move through the water cycle? A the sun the rain C precipitation the ground​
Firdavs [7]

Answer: A. The Sun

Explanation: A. The Sun makes water move through the water cycle

6 0
3 years ago
A toy train has an acceleration of 1.2 m/s2. A net force of 3.0 N is acting on the train. What is the mass of the train?
STALIN [3.7K]

Answer:

2.5 kg

Explanation:

We can solve the problem by using Newton's second law:

F=ma

where

F is the net force acting on the train

m is the mass of the train

a is the acceleration

For the toy train in the problem,

F = 3.0 N

a = 1.2 m/s^2

So we can solve the formula for m, to find the mass of the train:

m=\frac{F}{a}=\frac{3.0 N}{1.2 m/s^2}=2.5 kg

7 0
3 years ago
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