Answer:
the weight of the object, the force of gravity acting on said object, and the mass of the object are needed for Newton's second law of motion.
Answer:
ball D will fall toward the ground at the same time as ball C
Explanation:
both balls experience the same downward (vertical) force of gravity as such they will both fall down at the same time, given that all other factors are equal.
although the ball were through with different forces,
those forces where in the horizontal direction but the force of gravity (downward force) will act on them equally to bring them down at the same time
Mass of the system is 25.2 kg
Calculation:
F=ma
m = F/a where a = m/t^2
a=2.3/(1.3)^2 = 1.36 m/s^2
m=34.3/1.36
m=25.2 Kg
Answer:
Density = 1027.3 [kg/m3]
Explanation:
To solve this problem we must use the concept of density which is defined as the relationship between mass and volume, which can be determined by the following equation.
density = m/v
m = mass = 308.19 [gramm] = 0.30819 [kg]
v = volume = 300 [mL] = 0.3 [Lt] = 0.0003 [m3]
density = (0.30819/0.0003)
density = 1027.3 [kg/m3]
Answer:
The correct answer is D. Static friction is much stronger than kinetic friction, so it takes more force to get an object moving than it does to keep it moving.
Explanation:
We can eliminate choice A if we know that both static friction and kinetic friction depend on what are called the coefficients of static friction and kinetic friction, respectively. These coefficients are a reflection of the nature of the surface. In other words, both static friction and kinetic friction depend on the surface material (choice A is incorrect).
Choice B is incorrect because static friction applies to still (static) object whereas kinetic friction applies to moving objects (that have kinetic energy).
Choice C is also incorrect.
Choice D is correct as described in the given information. It takes much more force to start an object from rest than to keep it moving. Think about things in your everyday life - it takes a push to get a toy car moving along the ground, but you do not need to consistently push the car with the same force to keep it moving. This reflects that static friction is much stronger than kinetic friction, which is also described by the relationship between their coefficients (the coefficient of static friction is generally greater than that of kinetic friction).
Hope this helps!