Q1. A car travels d=10km[E] then d=20km[N] What is the displacement travelled * a) 30km
b) 30km[NE]
c) 22km[NE]
d) 22km[E63oN]
Q2. A boat travels west at 20km/h. The journey lasts 3hours. How far has the boat travelled? *
a) 60km
b) 60km[W]
c) 17km[W]
d) 6.6km[W]

An input force of 7 n is applied to a machine with a mechanical advantage of 1.75. what is the maximum the machine could lift? 12.25 n7n7.25 n26.2 n

A1200 kg car traveling north at 10 m/s is rear-ended by a 2000 kg truck traveling at 30 m/s. what is the total momentum before and after the collision?

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.