PHYSICS POP QUIZ 3 (EFFECTS OF FORCE AND IMPULSIVE FORCE)

NAME: ………………………………………………………

CLASS: 4 SN 2

TEACHER: EN. IDRUL NAFIZ BIN MUHAMAD NAJIB

You are given only 10 minutes to complete all the questions. Answer all questions on the paper

1) Diagram 1 shows an egg being dropped onto a wodden block. The egg cracks after impact. The velocity of the egg just before the impact is 5 m/s.

a) Name the force involved during the impact…………………………………………………………………………(1 mark)

b) Give one reason why the egg cracked after the impact……………………………………………………………………………………………………………………………………………………………(1 mark)

c) The mass of egg is 0.05 kg and time of impact is 0.1 s. Calculate the impulsive force and impulse

(4 mark)

d) Give one suggestion how you would avoid the egg from cracking when dropped from the same height…………………………………………………………………………(1 mark)

10

Egg

Wooden block

2) A horizontal force is exerted on a box of mass 10 kg as shown in Diagram 2. The box accelerates at 2 ms-2

a) What is the value of horizontal force exerted on the box?

(1 mark)

b) If the frictional force acting between the box and the floor is 5 N what is the resultant force exerted on the box?

(2 mark)

F