Inv. 4.4.2 The Efficiency of a Ramp Question: How do the factors affect the efficiency of a ramp used to raise a cart? Hypothesis: I feel that changing the (mass, slope, friction) will affect the efficiency of a ramp. Materials: refer to pg. 143 Nelson Physics 11 Procedure: refer to pg. 144 Nelson Physics 11 Observations: mass slope friction 1 2 3 4 5 6 7 mass of cart + weights, m (kg) length of ramp, ∆d (m) height of ramp, ∆h (m) force parallel to ramp, Fa (N) work input, Ein (J) useful energy output, Eout (J) efficiency (%) (1)

Fa = ? N ∆d = ? m ∆h = ? m Ein = Fa∆d Eout = mg∆h

Analysis: (d) (3) (e) (1) (f) (1) Evaluation: (g) (1) (h) (1) (i) (1) Synthesis: (j) (1) 4.4 Understanding Concepts 2. (a) (6) (b) (6) (c) (1) (d) (1) (e) (6) (f) (1) (g) (1) (h) (6) 3. (a) (6) (b) (6) 5. (a) (6) (b) (6)