N = normal force by the surface of incline on the box resting on it
m = mass of the box resting on the incline surface = 30 kg
g = acceleration due to gravity acting on the box = 9.8 m/s²
θ = angle of the incline with the horizontal surface = 15⁰
from the force diagram , force equation perpendicular to incline surface is given as
N = m g Cosθ
inserting the values in the above equation
N = (30 kg) (9.8 m/s²) Cos15
N = 284 newton
2 minutes = 120s
S (distance) = v (velocity) x t (time)
S= 3 x 120
S = 360m
So, D is a correct answer
Answer:
the mass of the cart is 150 kg
Explanation:
given,
mass of boy(m) = 50 kg
speed of boy (v)= 10 m/s
initial velocity of cart (u) = 0
final velocity of cart(V) = 2.5 m/s
mass of the cart(M) = ?
m v + M u = (m + M ) V......................(1)
50× 10 + 0 = (50 + M ) 2.5
M =
M = 150 Kg
hence, the mass of the cart is 150 kg
Answer:
Option (A) : Nuclear Fusion and Beta Decay (electron emission)