2. We can only add and subtract numbers in Physics if they have the same units. For example I can add 5.0m to 12m to get 17m but I cannot add 5.0m to 10mis. You cannot add a velocity (10m/s) to a distance (5m) and get anything meaningful Use dimensional analysis (see video in lessons] to ensure that the kinematic equations shown below adhere to this rule. (Note: it does not matter at this stage if you understand the physics behind the equations). The units for each variable are given. The first one is done for you. Variable Units m/ 5 a V=V + at + at Step 1: replace each variable with units only [mis] = [m/'s] + [m/s=][=] Step 2: cancel and simplify where possible [mis] = [m/3] + [m/=2][=] Step 3: compare resulting terms (same?) [mis] = [mis] + [m/s] Conclusion: Since each term has the units of m/'s, the equation is likely valid. b. v= dt conclusion: valid 7 invalid (circle one) C. d=vt conclusion: valid / invalid (circle one) d. d=vt+ Katz (remember that the %% doesn't have a unit so lan T considered) conclusion: valid / invalid (circle one)