7 The tape in Figure 2.7 was pulled through a timer by a trolley traveling down a runway. It was marked off in
tentick lengths.
a What can you say about the trolley’s motion?
b Find its acceleration in cm/s2.

answer:

The tape in Figure 2.7 was pulled through a timer by a

trolley travelling down a runway. It was marked off in

tentick lengths.

a What can you say about the trolley's motion?

b Find its acceleration in cm/s2

2 16 m in 45

3 with a uniform acceleration of 2 m/s2

Which statement(s) is (are) correct?

A 1,2,3 B 1,2 C 2,3 D 1 E 3

10 If a train travelling at 10 m/s starts to accelerate at 1 m

for 15s on a straight track, its final velocity in m/s is

A 5 B 10 C15 D20 E 25

it becomes positively charged by charging it

probably not if net force is zero