physicist
03-12-2006, 09:58 AM
Work sheet G(10)
10F.22.2,3,4
1)True or false
a) The displacement is a vector quantity.( )
b) You can not use the equations of motion when the motion is described by a straight line ( )
c)The S.I unit of force is Newton.( )
d) The force can not change the shape and velocity of an object. ( )
e) The distance should always be equal to the displacement.( )
f) The gravitational force is a contact force.( )
g) Both the speed and velocity are characterized by their
direction and magnitude. ( )
h) If the velocity of a body is decreasing after a certain time we can say the body is accelerating.( )
i) If the velocity of a body does not change after time passed , so the acceleration of the body should be equal to zero.( )
j) The net force can determined the direction of motion the body. ( )
k) Vector quantity is a scalar quantity but with direction.
( )
A car is travelling at 40 m/s and takes 10 seconds to accelerate to a new speed of 80
m/s. What is its acceleration
A car accelerates uniformly from 20 m/s at 15 m/s2. Find the final velocity after 20 second.
10F.22.2,3,4
1)True or false
a) The displacement is a vector quantity.( )
b) You can not use the equations of motion when the motion is described by a straight line ( )
c)The S.I unit of force is Newton.( )
d) The force can not change the shape and velocity of an object. ( )
e) The distance should always be equal to the displacement.( )
f) The gravitational force is a contact force.( )
g) Both the speed and velocity are characterized by their
direction and magnitude. ( )
h) If the velocity of a body is decreasing after a certain time we can say the body is accelerating.( )
i) If the velocity of a body does not change after time passed , so the acceleration of the body should be equal to zero.( )
j) The net force can determined the direction of motion the body. ( )
k) Vector quantity is a scalar quantity but with direction.
( )
A car is travelling at 40 m/s and takes 10 seconds to accelerate to a new speed of 80
m/s. What is its acceleration
A car accelerates uniformly from 20 m/s at 15 m/s2. Find the final velocity after 20 second.