Physics (AS & A Level) Paper 21
May / June 2017·9702·7 questions
Mock exam: 75 min, official timing
Question paper
Question 1
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Mark scheme
Question 1
1(a)[2]
1(b)(i)[3]
1(b)(ii)[3]
1. (accuracy determined by) the closeness of the value(s)/measurement(s) to the true value (precision determined by) the range of the values/measurements 2. l is (cubed so) 3 × (percentage/fractional) uncertainty and T is (squared so) 2 × (percentage / fractional) uncertainty and (so) l contributes more
Question 2
2(a)[2]
2(b)(i)[2]
2(b)(ii)[2]
2(b)(iii)[2]
2(b)(iv)[6]
1. weight = 95 × 9.81 (= 932 N) vertical tension force = 280 sin 25° or 280 cos 65° (=118.3 N) F = 932 + 118 = 1100 (1050) N 2. horizontal tension force = 280 cos 25° or 280 sin 65° (= 253.8 N) resultant force = 95 × 1.4 (= 133 N) 133 = 253.8 – R R = 120 (120.8) N
Question 3
3(a)[3]
3(b)(i)[1]
3(b)(ii)[3]
3(c)(i)[2]
3(c)(ii)[1]
Question 4
4(a)[2]
4(b)(i)[2]
4(b)(ii)[3]
Question 5
5(a)[1]
5(b)[3]
Question 6
6(a)[1]
6(b)(i)[3]
6(b)(ii)[1]
6(b)(iii)[2]
6(c)(i)[1]
6(c)(ii)[2]
6(d)(i)[1]
6(d)(ii)[1]
Question 7
7(a)(i)[1]
7(a)(ii)[1]
7(b)(i)[1]
7(b)(ii)[1]
7(b)(iii)[1]