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cestrela7 [59]
3 years ago
6

Find the magnitude of the vector 33 i^+ 15 j^m.

Physics
1 answer:
Olenka [21]3 years ago
7 0
The magnitude of  33 i  +  15 j  is

                   √ (33² + 15²)

               =  √ (1089  +  225)

               =   √ 1314   =   36.25   (rounded)
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A 75kg hockey player is skating across the ice at a speed of 6.0m/s. What is the magnitude of the average force required to stop
liq [111]

Answer:

692.31 N

Explanation:

Applying,

F = ma............... Equation 1

Where F = Average force required to stop the player, m = mass of the player, a = acceleration of the player

But,

a = (v-u)/t............ Equation 2

Where v = final velocity, u = initial velocity, t = time.

Substitute equation 2 into equation 1

F = m(v-u)/t............ Equation 3

From the question,

Given: m = 75 kg, u = 6.0 m/s, v = 0 m/s (to stop), t = 0.65 s

Substitute these values into equation 3

F = 75(0-6)/0.65

F = -692.31 N

Hence the average force required to stop the player is 692.31 N

6 0
3 years ago
A 0.03 kg baby sea turtle moves across the sand toward the ocean at 0.3 m/s. What is her kinetic energy in Joules?
lina2011 [118]

Answer:

.00135 j

Explanation:

K.E. = 1/2   m  v^2

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4 0
3 years ago
Mathew throws a ball straight up in the air. it rises for a period of time and then begins to drop. At which points in the balls
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3 0
3 years ago
1) A train accelerates from 36 km/hr to 54 km/hr in 10<br> s. Find acceleration?
Crank

Answer: Given:

Initial velocity= 36km/h=36x5/18=10m/s

Final velocity =54km/h=54x5/18=15m/s

Time =10sec

Acceleration = v-u/ t

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=100+25

=125m

So distance travelled 125m

Hope it helps you

3 0
4 years ago
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