<span>Using Newton’s 2nd
law, we can calculate for the force (F) required to give a mass 255kg an
acceleration of 3.5 m/s^2: </span><span>
F= ma</span>
<span>F= 255kg*3.5m/s^2 = 892.5 N </span>
892.5 was the force needed for the motorcycle alone. Taking
into account the total resistance of 400N:
total F = 892.5 N + 400 N
<span>total F= 1292.5 N</span>
Answer:
The magnetic field is strongest at the center and weakest between the two poles just outside the bar magnet. The magnetic field lines are densest at the center and least dense between the two poles just outside the bar magnet.
Explanation:
I can't tell right away. The elevator's limit is given in terms of mass, but the four people are listed in terms of their weights. In order to compare them, we'll have to convert one or the other.
The total of the four people's weights is:
John . . . . . . . 850N
Betty . . . . . . . 530N
Robert . . . . . . 740N
Alice . . . . . . . .610N
Total . . . . . . 2,730N
The elevator can't accept more than 300 kg of mass.
The weight of any mass is (mass) x (gravity).
On Earth, 300kg weighs (300kg) x (9.8 m/s²) = 2,940 N.
Wonderful !
2,730N is less than 2,940N.
<em>Yes !</em> According to Otis' engineers, John, Betty, Robert and Alice <em>can safely ride the elevator together</em>, (although Betty and Alice may have a different opinion).
Answer: 1.2 seconds
Explanation:
Initial velocity =u=13.9m/s
Acceleration due to gravity=g=9.8m/s^2
Φ=25°
Time=t
T=(2 x u x sinΦ) ➗ g
T=(2 x 13.9 x sin25) ➗ 9.8
T=(2 x 13.9 x 0.4226) ➗ 9.8
T=11.75 ➗ 9.8
T=1.2 seconds