Answer:
8.1Ns
Explanation:
Impulse is expressed as the product of Force and time
Impulse = Ft
F is the force = 180N
Get the time using the equation of motion
v = u+at
18 = 0+F/m(t)
18 = 180/0.45(t)
18 = 400t
t = 18/400 secs
Recall that;
Impulse = Ft
Impulse = 180×18/400
Impulse = 8.1Ns
Hence the impulse imparted to the ball is 8.1Ns
Answer:
Final speed of the crate is 15 m/s
Explanation:
As we know that constant force F = 80 N is applied on the object for t = 12 s
Now we can use definition of force to find the speed after t = 12 s
so here we know that object is at rest initially so we have
Now for next 6 s the force decreases to ZERO linearly
so we can write the force equation as
now again by same equation we have
put t = 6 s
Answer:
Your answer is in the pic
Arrows represent vector quantities, which have both a magnitude (size) and a direction. For example on Earth, weight acts towards the planet's centre due to the effect of the gravitational field, and has a magnitude in Newtons (e.g. 10N). However, mass is a scalar quantity, meaning that it only has a magnitude - it's just the amount of stuff you have. It would be like an arrow without a direction, which of course is not possible (at least not in this universe...)
Answer: They are identical brightness
Explanation:
If the lights are assumed to be resistance bulbs
Each light has the same current and will each drop one third of the supply voltage.
