Answer:
The correct answer is
p = p₁ + p₂
Explanation:
Newton's second law states that force = the change of momentum produced therefore since the collision is inelstic then the change of momentum of each car is p₁ and p₂ and the force of the collition is proportional to p₁ + p₂ that is
F ∝ p₁ + p₂ and since force is directly proportional to p we have
p = p₁ + p₂
Answer:
The acceleration of the plane is 10.93 m/s² at that instant.
Explanation:
Given:
Mass of aircraft, 
Downward thrust produced, 
Upward resistance force by air, 
Weight of the aircraft acting donward, 
According to Newton's second law, net force acting on an object is equal to the product of mass and its acceleration.
Here, the net force is given as the difference of downward forces and upward forces.
Now,
Therefore, the acceleration of the plane is 10.93 m/s² at that instant.
Answer:
Seafloor spreading is a geological process that occurs in the ocean. It is occurs due to divergent plate tectonics. As, lithospheric plates of the ocean moves away from each other, the heat from the mantle liberates as convection currents that decreases the density of the crust. The less dense material rises, resulting the elevation of the seafloor, which is called as sea floor spreading.
Explanation:
Answer:
Weight of air per unit area is pressure due to atmosphere. So here correct answer is Weight
Explanation:
As we know that air pressure is given by
now we know that force here due to air is due to the weight of the air
so here in order to calculate the weight we will have
here we know that
Ah = volume of air above the point where pressure is to be calculated
now from above formula we have
so here we can say that pressure is due to weight of air
Answer:
15.7 N
Explanation:
Draw a free body diagram. The block has four forces acting on it. Gravity pulling down, normal force pushing perpendicular to the plane, friction pointing up the plane, and applied force F pushing up the plane.
Sum of the forces normal to the plane:
∑F = ma
N − mg cos θ = 0
N = mg cos θ
Sum of the forces parallel to the plane:
∑F = ma
Nμ + F − mg sin θ = 0
F = mg sin θ − Nμ
Substituting:
F = mg sin θ − mgμ cos θ
F = mg (sin θ − μ cos θ)
Given mg = 87.0 N, θ = 24.1°, and μ = 0.25 (because the block is not moving):
F = 87.0 N (sin 24.1° − 0.25 cos 24.1°)
F = 15.7 N
