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3 years ago

14

If there was no frictional force acting on the ball in question 2 what would happen to the player? Use inertia and Newton’s 1st

law to explain in complete sentences

1 answer:

laila [671]3 years ago

6 0

Newwton's law of inertia states that an object will not be able to move unless force is applied to it

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A stone is launched straight up by a slingshot. Its initial speed is 19.6 m/s, and the stone is 1.50 m above the ground when lau

arlik [135]

Answer: a) 19.21m b) 3.92secs

Explanation:

a) Maximum height reached by the object is the height reached by an object before falling freely under gravity.

Maximum height = U²/2g

U is the initial velocity = 19.6m/s

g is acceleration due to gravity = 10m/s²

Maximum Height = 19.6²/2(10)

H = 19.21m

b) The time elapsed before the stone hits the ground is the time of flight T= 2U/g

T= 2(19.6)/10

T = 39.2/10

Time elapsed is 3.92secs

5 0

3 years ago

A person hits a tennis ball with a mass of 0.058 kg against a wall.

horrorfan [7]

Explanation:

Mass of the ball, m = 0.058 kg

Initial speed of the ball, u = 11 m/s

Final speed of the ball, v = -11 m/s (negative as it rebounds)

Time, t = 2.1 s

(a) Let F is the average force exerted on the wall. It is given by :

$F=\dfrac{m(v-u)}{t}$

$F=\dfrac{0.058\times (11-(-11))}{2.1}$

F = 0.607 N

(b) Area of wall, $A=3\ m^2$

Let P is the average pressure on that area. It is given by :

$P=\dfrac{F}{A}$

$P=\dfrac{0.607\ N}{3\ m^2}$

P = 0.202 Pa

Hence, this is the required solution.

8 0

3 years ago

You forgot to put what IRITONCF is unscrambled

Lesechka [4]

I'm Pretty sure it's FRICTION

4 0

3 years ago

Pendulum mass is 4 kg. Use your equations for gravitational potential energy and kinetic energy to determine these values based

mrs_skeptik [129]

its should be 2.0 and 4.5 on it

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3 years ago

A car speeds up as it rolls down a hill. Which is this an example of? A. positive acceleration B. negative acceleration C. relat

alina1380 [7]

I believe it is A. positive acceleration since it is speeding up

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3 years ago