Tutor Physic - Mechanic

A man walks 8 m to the east followed by another 6 m to the south. What is his eastward displacement?

• 2 m

• 6 m

• 8 m

• 14 m

A car accelerates at a rate of 5m/s2 from rest for 10s. What is its speed at the end of 10s?

• 2 m/s

• 0 m/s

• 50 m/s

• 5 m/s

A racing car accelerates uniformly along a straight road. Marker posts are placed at 100 m apart along the road. The car has a speed of 10 m/s when it passes one post, and 20 m/s when it passes the next. What is the acceleration of the car?

• 1.5 m/s −2

• 6.0 m/s −2

• 0.67 m/s −2

• 2.5 m/s −2

. A metal ball hits a sand bed one second after it is released from rest, and makes an impression 8.0 mm deep in the sand. Air resistance may be taken as negligible. What is the average deceleration of the ball on hitting the sand?

• 6.0 x 10^2 m/s −2

• 1.2 x 10^3 m/s −2

• 6.0 x 10^3 m/s −2

• 1.2 x 10^4 m/s −2

A car decelerates at a rate of 5 m/s2 from an initial speed of 40 m/s. What is its speed after 6 s?

• 35 m/s

• 8 m/s

• 29 m/s

• 10 m/s

A car has a hole in the petrol tank and petrol is dripping off the tank at a constant interval. Which of the following statement is true about the diagram shown ?

• The car is decelerating

• The car is moving at an increasing deceleration

• The car is moving at a constant speed

• The car is accelerating

A car has a hole in the petrol tank and petrol is dripping off the tank at a constant interval. Given that the car is travelling at a constant speed of 2 m/s and the gap between two drops of petrol along the road is 50 cm, calculate the frequency of the drip of the petrol.

• 0.25 Hz

• 8 Hz

• 25 Hz

• 4 Hz

For a particle accelerating along a straight line, what is the definition of its velocity?

• Velocity is the rate of change of displacement

• Velocity is the rate of change of distance

• Velocity is displacement divided by time

• Velocity is distance divided by time

The figure denotes velocity−time graph. Displacement is equal to:

• 
• 
• 
• 

A body starting from rest moves along a straight line with a constant acceleration. The variation of speed ν with distance s is represented by the graph?

• 
• 
• 
•