Answer:
Explanation:
Let the normal force of the wall on the ladder be N2 and the normal force of the ground on the ladder be N1.
Horizontal forces:
[1]
Vertical forces:
[2]
Substitute [2] into [1]:
[3]
Torques about the point where the ladder meets the ground:
tanα =
From Newton's second law, F= ma
F = 2000 kg x 15 m/s^2 = 30000 N
P= 10m = 10 x 9.10 = 91 N
Work is done lifting a 9.10-kg box straight up onto a shelf that is 1.80 m high :
A= Ph = 91 x 1.80 = 163.8 J
ok done. Thank to me :>
Answer:The deltoid is a muscle in the shoulder It has the shape of a hollow semi-cone
Explanation:
If the ice absorbed 350,000 joules in 5 minutes, then it absorbed energy
at the rate of
(350,000 joules) / (5 x 60 seconds) =<em> 1,166-2/3 watts</em> .
Surely the ice cube didn't absorb every joule delivered to the cooking chamber,
so the microwave oven's cooking power had to be significantly more than that.