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2 years ago

7

A tennis ball is thrown into

1 answer:

liraira [26]2 years ago

7 0

Answer:

Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.

Explanation:

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There are some ways objects in motion are affected. _______________, or pushes and pulls, affect the motion of an object. ______

AysviL [449]

Answer:

Forces, Gravity, Friction, Direction, Acceleration.

8 0

3 years ago

Read 2 more answers

At highway speeds, a particular car is capable of an acceleration of about 1.6 m/s?. At this rate,

kicyunya [14]

Given parameters:

Acceleration of the car = 1.6m/s

Initial speed = 80km/hr

Final speed = 110km/hr

Solution:

Time taken to achieve this speed = ?

Solution:

Acceleration is the rate of change of velocity with the time taken.

Mathematically;

a = $\frac{V - U}{T}$

where a is the acceleration

V is the final velocity

U is the initial velocity

T is the time taken

Now make the unknown time the subject of the expression;

aT = V - U

T = $\frac{V - U}{a}$

Convert the given acceleration to km/hr;

1.6m/s = 1.6 x $\frac{m}{s}$ x $\frac{1km}{1000m}$ x $\frac{3600s}{1hr}$ = 5.76km/hr

Input the parameters and solve;

T = $\frac{110 - 80}{5.76}$ = 5.2hrs

The time taken is 5.2hrs

5 0

4 years ago

A force of 150 N is exerted 22° north of east. What is the

svetlana [45]

Answer: B

Explanation:

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3 years ago

In a series circuit, an ammeter shows the current leaving the positive end of a cell is 0.5A. What current flows into the negati

Evgesh-ka [11]

Answer:

0.5A as in a series circuit the current is the same everywhere

Explanation:

5 0

3 years ago

Tom kicks a soccer ball on a flat, level field giving it an initial speed of 20 m/s at an angle of 35 degrees above the horizont

SVEN [57.7K]

Answer:

(a) 2.34 s

(b) 6.71 m

(c) 38.35 m

(d) 20 m/s

Explanation:

u = 20 m/s, theta = 35 degree

(a) The formula for the time of flight is given by

$T = \frac{2 u Sin\theta }{g}$

$T = \frac{2 \times 20 \times Sin35 }{9.8}$

T = 2.34 second

(b) The formula for the maximum height is given by

$H = \frac{u^{2} \times Sin^{2}\theta }{2g}$

$H = \frac{20^{2} \times Sin^{2}35 }{2 \times 9.8}$

H = 6.71 m

(c) The formula for the range is given by

$R = \frac{u^{2} \times Sin 2\theta }{g}$

$R = \frac{20^{2} \times Sin 2 \times 35}{9.8}$

R = 38.35 m

(d) It hits with the same speed at the initial speed.

8 0

4 years ago