The mode of transport chosen by students to reach school are shown in the below pie chart. Overall 70 students walked to school. How many students are there in the school overall Walk = 50% 70 students
Car = 25% x students
Bus = 25% x students

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

What do you think car designers do if the damage caused by a crash test is too severe?

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?