Throw an object horizontally at the initial velocity of VO = 10m / s, and after flying for a period of time, vertically hit the inclined plane with an inclination of 45 ° to calculate the time for the object to complete the flight. (g takes 10m / S2)

Throw an object horizontally at the initial velocity of VO = 10m / s, and after flying for a period of time, vertically hit the inclined plane with an inclination of 45 ° to calculate the time for the object to complete the flight. (g takes 10m / S2)

tanθ=v/v0
∴V=V0=10m/s
V=gt=10m/s
t=1S

When the initial velocity V0 is 10m / s, the block with mass m = 2kg slides upward from the bottom of the inclined plane. The inclined plane is 37 ° and long enough. The dynamic friction factor between the block and the inclined plane is u = 0.5 (sin 37 ° = 0.6, cos 37 ° = 0.8)
1、 What is the friction force when the block slides up the slope?
2、 What is the acceleration of the block when it slides upward from the bottom of the slope?
3、 How long does it take for a small piece of wood to slide up from the bottom of the slope to the top and back to the bottom?

There is a problem with wary17 upstairs
1 f=μN =μmgcos37°=8N
2. The downward component of parallel inclined plane f = mgsin 37 ° = 12n. Because both forces are downward, the resultant force F = 20n = ma a = 10m / S ^ 2
The results show that the acceleration of the 3 blocks is a 1 '= gsin37 - μ gcos37 = 2m / S ^ 2, the distance of sliding up is s = at ^ 2 / 2 = 5m, and the acceleration of the 3 blocks is a 1' = gsin37 - μ gcos37 = 2m / S ^ 2
From S = a1t1 ^ 2 / 2, we get T1 = 2.236s (J means root 5)
So the total time is t + T1 = 3.236s

Physical calculation formula of specific heat capacity?

Specific heat capacity, also known as specific heat capacity, is the heat capacity of a unit mass substance, even if the unit mass substance changes the internal energy absorbed or released when the unit temperature is changed. Specific heat capacity is the physical quantity that represents the thermal property of a substance. It is usually represented by the symbol C
The calculation formula is q = cm △ t
Q is the heat, C is the specific heat capacity, M is the mass, and △ t is the changing temperature
Q suction = cm (t-t0)
Q absorption is the heat absorbed, C is the specific heat capacity, M is the mass, t is the final temperature and t0 is the initial temperature
Q = cm (t0-t)
Q represents the heat released, C represents the specific heat capacity, M represents the mass, T represents the final temperature, and t0 represents the initial temperature