Question 851:

• JAMB 1997

The distance xm travelled by a particle in time t seconds is described by the equation x = 10 + 12t², Find the average speed of the particle between the time interval t = 2s and t = 5s

A. 60 ms^-1
B. 72 ms^-1
C. 84 ms^-1
D. 108 ms^-1

Question 852:

• JAMB 1997

A 5kg block is released from rest on a smooth plane inclined at an angle of 30^o to the horizontal. What is the acceleration down the plane? [g = 10ms^-2]

A. 5.0 ms^-2
B. 5.8 ms^-2
C. 8.7 ms^-2
D. 25.0 ms^-2

Question 853:

• JAMB 1997

An arrow of mass 0.1kg moving with a horizontal velocity of 15ms^-1 is shot into a wooden block of mass 0.4kg lying at rest on a smooth horizontal surface. Their common velocity after impact is

A. 15.0 ms^-1
B. 7.5 ms^-1
C. 3.8 ms^-1
D. 3.0 ms^-1

Question 854:

• JAMB 1997

Two bodies X and Y are projected on the same horizontal plane, with the same initial speed but at angles 30 and 60 respectively to the horizontal. Neglecting air resistance, the ratio of the range of X to that of Y is

A. 1:1
B. 1:2
C. √3:1
D. √3

Question 855:

• JAMB 1997

Which of the following with respect to a body performing simple harmonic motion are in phase?

A. Displacement and velocity of the body
B. Displacement and force on the body
C. Velocity and acceleration of the body
D. Force acting on the body and the acceleration