**Answer:**

1) The acceleration will be g = 9.8 m/s²

2) F = Wsinα = mgsinα = 400kg·9.8m/s²·1/2 = 2000N

**Answer:9.51 m/s**

**Explanation:**

Given

Window is 4.35 m above ground

time taken=1.2 s

Let u be the initial velocity of keys

where s=distance traveled

u=initial velocity

t=time taken

g=acceleration due to gravity

(b)velocity of keys just before they were caught

v=u+at

v=-2.26 m/s

Here negative sign indicates downward motion of keys

**Answer:**

the length of resultant vector is 5 inches

**Explanation:**

In the attachment, you will see X vector along the X axis and Y vector along the Y direction. Let the resultant vector be denoted by

The resultant vector always start from the tail of first vector and ends at the head of second vector.

Since it is a right angled triangle, so the result of resultant vector is found by using Pythagoras theorem i.e.

So, when we plug in the values of X = 48 and Y = 14

Therefore, the length of resultant vector is 5 inches.

**Answer:**

323.4 N

**Explanation:**

Given that,

The coefficient of static friction,

The coefficient of kinetic friction,

**We need to find the frictional force acting on the player. As the baseball player is sliding into home base, we will use the coefficient of kinetic friction to find the frictional force.**

**So, the frictional force acting on the player is 323.4 N.**