Question 9 The speed - time graph of a car is given here. Using the data in the graph calculate the
total distance covered by the car

30
F
25
E
+
20
D
15
С
speed (in m/s) 10
B
5
A
0
30
50
40
10 20
time (ins)

A50.0-n box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. you observe that at one instant the box is sliding to the right at and that it stops in 2.25 s with uniform acceleration. what magnitude force does friction exert on this box

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the