Answer:
<h2>
Which of the following best explains work?</h2>
<h3>
<em>Work occurs when a force acts on an object and causes a displacement of that object</em><em>.</em><em>.</em></h3>
<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em><em>u</em><em>.</em><em>.</em>
Answer:
2592 km/h
Explanation:
Given that a bullet is shot from a rifle with a velocity of 720 m/s. What is the velocity of the bullet in km/h.
The velocity = 720 m/s
Solution
To convert metres per second to kilometer per hour, you will multiply by 3600 and divide by 1000
720 × 3600/1000
720 × 3.6
72 × 36
2592 km/h
Therefore, the velocity of the bullet in kilometer per hour is 2592 km/h
0° C = 273.15 K
Notice that the K temp is 273.15 more than the C temp.
So, to get any Celsius temp, subtract 273.15 from the Kelvin temp.
Answer:
a) 0.323m/s b) 54.278 m/s
Explanation:
The shell is moving upward with a speed of 17m/s
1.7s after it was launch
Using equation of motion on a straight line,
Vfinal = Vintial + acceleration due to gravity *time
Where V represent the speed(velocity)
Vinital = V(at 1.7s) - 9.81* 1.7
Vinital = 17 - 16.677
a) Vinital = 0.323m/s
b) using the same equation,
V(after 5.5s) = Vinital + 9.81*5.5s
Vafter5.5s = 0.323 + 53.955
V after 5.5s = 54.278m/s
Answer:
4440N
Explanation:
Given parameters:
Mass = 444kg
Acceleration due to gravity = 10m/s²
Unknown:
Tension in the cable = ?
Solution:
The tension in the cable is due to the weight of the mass it is suspending.
So;
Weight = mass x acceleration due to gravity
Weight = 444 x 10 = 4440N