Soalan Effect of Force & Impulse

8/10/2019 Soalan Effect of Force & Impulse

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1 1 N is equivalent to

A 1 kg ms-1 B 1 kg ms-2

C 1 ms kg-1 D 1 kg s m-1

2 Which of following is noteffects of a constant force?

A Change the direction of motionB Change the shape of an object

C Change the velocit of a moving objectD Change the acceleration of a moving object

3 !he figure shows the graph of motion for two objects "and N is acted on b a same force#

Which comparision is correct about the mass of " andN?

$ "ass of " % "ass of N& "ass of " ' "ass of NC "ass of " ( "ass of N

4 Which of the following graph is true to show therelationship between the acceleration)a ) the mass ) mand the force )*

5 Which of the following objects acted on b a pair of forceswill accelerate?

6 !he figure shows forces ) *1and *2) e+erted on awooden block placed on a table surface# !he frictionbetween the block and the table surface is 2 N#

Which pair of forces *1and *2causes the wooden blockto move with an acceleration?

*1, N *2, N

A .B / C 0 D / 2E 1

7 $n object of mass #2 kg is pulled on a smooth floor b aforce of 3 N# What is the acceleration of the object ?

A 2 ms-2 B ms-2C 0 ms-2 D 3 ms-2E 10 ms-2

8 *igure shows an object of mass 2 kg is pulled on a floorb a force of 1 N# !he frictional force between theobject and the floor is / N#

What is the acceleration of the object?A 2 ms-2 B ms-2C 0 ms-2 D 3 ms-2

E 1 ms-2

9 $ bo+ with a mass / kg is pushed along a rough surfacewith a force 1 N# 4f the acceleration of the bo+ is / ms-2)what is the frictional force between the bo+ and therough surface?

A # N B 1#NC 1# N D 2# NE 2# N

10 $ car of mass 1 2 kg travelliling at 2 ms-1is brought torest over a distance m# *ind the average brakingforce#

A N B 2 NC 2 N D 0 NE 1 2 N

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11 $ particle of mass #2 kg is moving with a velocit1 ms-1on a smooth surface # $ force N acts on theparticle such that its velocit increases to 1 m s-1# *orhow long will the force act on the particle?

A #1 s B #2 sC #1 s D #2 sE 1# s

12 *igure shows a wooden block of mass 2 kg resting on africtionless surface# placed on a table surface# !he frictionforce between the block and the table surface is 2 N#

!wo forces 5 and 6 e+erted on the wooden block inthree difference situations#!he magnitude of 5 and 6 are N and 12 N respectivel#

!he following table shows the situations and the resultantforce occurred#

#

Situation Resultant force

$&C

1. N1/ N. N

7a8 What is meant b the resultant force?

9999999999999999999999##7b8 :raw the forces 5 and 6 in figure 7a8 )7b8 and 7c8

which produced the resultant force as shown in thetable above#

7c8 ;ater on the wooden block is pulled b a force of2 N on a rough table surface as shown in figure 7d8

4f the acceleration of the block is 0 ms-2)7i8 Calculate the magnitude of the friction force

between the block and the rough table surface

7ii8


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7i8 What is the friction force between the wooden

blocks and the rough surface?

7ii8 What is the force is needed to move the woodenblocks with an acceleration is same as theacceleration in 7c87i8#

14 *igure 7a8 shows a car is pulling a boat and movingwithout the boat respectivel#*igure 7b8 shows the car is moving without the boat#>bserve the *igure7a8 and 7b8# Compare the massand the acceleration of the moving objects#elate the mass and the acceleration of the movingobjects to deduce a relevant phsics concept#

15

!he motoccle and the lorr stop *igure 7a8

!he motoccle and the lorr accelerate*igure 7b8

@ach figure below shows a motoccle and a lorr in twosituations at a traffic light#>bserve the situations of the motoccle and the lorr ofeach diagram#&ased on the observationsA

7a8


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impulsive force is great#


5/6

&umper bars are placed below waist level to

reduce the likehood of the pedestrian beingrun over#

&onnet of a car can reduce casualt in car

accidents# When the car hits a pedestrian)the bonnet of the car will automaticall springupwards # !his will prolong the collision timeand hence reduces the impulsive forceacting on the pedestrian#

:river warning functions A!wo different tpesof driver warning functions will be provided#;ateral :rift Warning *unction !his*unctionalit will help drivers avoidinadvertent drift-off that ma result in strikinganother vehicle) roll-over or impact with afi+ed object#

Curve


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What is the impulsive force e+perienced b the ball?

A 1 N B 2 NC N D . NE 1 N

11 $ bo kicks a stationar ball of mass #1 kg# 4f the ball

moves forward at a velocit of 0 ms-1 and the timeinterval of contact of the boEs foot on the ball is ms)

what is the impulse force of the ball?

A / N B 0 NC 13 N D 0 NE 12 N

12 $ golf ball of mass g is hit with a force N# !hetime interval of interaction between the golf ball and theclub is #/ ms# What is the velocit of the golf ballimmediatel after it was hit#

A ms-1 B 1 ms-1

C 2. ms-1

D // ms-1

E ms-1

13 !he advantage of using the bumpers fitted with shockabsorbers in a car is

A to ensure that the car will decelerate in an accidentB to minimised the impulsive force during an accidentC to ensure that the car is not smashed in an

accident

14 Which of the following isnot a safet feature installed in

a vehicle ?

A @ngine capacitB $utomaticair bagC Collapsible steering wheelsD

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Soalan Effect of Force & Impulse